Boko ba bokooa boa je: Liphutheho tse thabisang le tse lakatsehang ka botenya le mathata a ho ja (2010)

. Mongolo o ngotsoeng ka letsoho; e fumanehang ho PMC 2011 Sep 2.

PMCID: PMC2913163

NIHMSID: NIHMS197191

inahaneloang

Seo re se jang, ka nako le ho feta hakae, kaofela li susumetsoa ke mekhoa ea bokooa ea boko e etsang hore 'ho rata' le 'ho batla' bakeng sa lijo. E le ho fokolisa, ho se sebetse ho lipotoloho tsa moputso ho ka tlatsetsa ho eketseha ha morao-rao oa botenya le mathata a ho ja. Mona re hlahloba lisebelisoa tsa boko tse tsejoang ho hlahisa 'ho rata' le ho 'batla' lijo, le ho hlahloba ho sebelisana ha bona le mekhoa ea taolo ea tlala le satiety, e amanang le litaba tsa bophelo bo botle. 'Ho rata' lisebelisoa ho kenyeletsa lipotoloho tsa hedonic tse kopanyang li-hotspots tsa cubic-millimeter libopeho tse kang li-nucleus accumbens le ventral pallidum (moo li-sign opioid / endocannabinoid / orexin li ka eketsang menyaka ea maikutlo). 'Ho batla' mekhoa e kenyelletsa marang-rang a maholo a opioid a nucleus accumbens, striatum, le amygdala e fetisang ka ntle ho li-hotspots tsa hedonic, hammoho le tsamaiso ea mesolimbic dopamine, le lisebelisoa tsa mahlaseli a maiketsetso a lumellanang le mekhoa eo. Re nahanisisa ka litsela tseo boko ba tsona bo putang lipotoloho ka tsona ho ka 'na ha kenya letsoho ho botenya haholo kapa mathateng a ho ja.

Selelekela

Lijo tse nang le melemo le lintho tsa tsona li ka ba le matla a susumetsang. Ho bona ha cookie kapa monko oa lijo tseo u li ratang ho ka 'na ha etsa hore motho a kene ka tšohanyetso,' me ho loma ho seng kae ho ka etsa hore a rate ho ja haholoanyane ("appétit vient en mangeant" joalokaha polelo ea Sefora e ea) . Lefats'eng le ruileng, lijo-thollo tse susumelletsoeng ke batho ba bang li etsa hore motho a je ka nako e le 'ngoe, kapa a je ho feta moo, esita le haeba a ne a rerile ho ila kapa ho ja feela ka mokhoa o itekanetseng. Ka ho susumetsa liqeto tsa hore na, neng, eng, le ho ja lijo tse kae, tse ling-tse bakang matšoao a khothalletsang liphallelo ho latela nako e telele ea caloric le ho nona haholo (; ; ; ).

Hase feela lijo kapa tholoana ka boeona e nang le matla ana a susumetsang: ke karabelo ea boko ba motho ea nang le boikutlo ho seo. Bakeng sa batho ba bang, mekhoa ea boko e ka 'na ea itšoara ka ho khetheha ha e hlahisa tšusumetso e susumetsang ea ho ja haholo. Bakeng sa e mong le e mong, ho tlosa litemoso ho ka ba matla ka ho khetheha linakong tse itseng tsa letsatsi, 'me ha ba lapetse kapa ba imetsoe. Phapang ea matla a susumetsang ho tloha ho motho ho ea ho motho le ho tloha motsotsoana ho fihlela motsotsong o hlaha ka karolo e tsoang mefuteng ea lipotoloho tsa bokooa tsa boko bo hlahisang 'ho batla' le ho 'rata' bakeng sa moputso oa lijo. Lipotoloho tseo tsa moputso ke sehlooho sa pampiri ena.

Thabo ea lijo kapa moleko o tsoa hokae? Taba ea rona ea mantlha ke hore moleko le monate oa lijo tse tsoekere, tse mafura kapa tse letsoai li hlaha ka bokong, eseng feela ho tsoa lijong tsa lijo ka botsona. Liketso tsa 'ho batla' le ho li 'rata' li hlahisoa ka mafolofolo ke litsamaiso tsa methapo e hlahisang takatso kapa monyaka ho maikutlo - joalo ka mofuta oa phatsimo e takiloeng ponong, monko kapa tatso (Lethathamo 1). K'hokete ea ho tsokolate e lekang ha e hlile e monate, empa boko ba rona bo na le boikemisetso ba ho hlahisa 'ho rata' ho eona e monate ea chocolaty le monate. Ho monate le ho hlaphoheloa ke linotlolo tse koalang ka potlako lipotoloho tsa boko tse nang le thabo le takatso ea lijo nakong ea ho kopana (; ; ). Leha ho le joalo ke ho bula ha boko ho koala hoo e leng habohlokoa ka ho fetisisa, eseng feela linotlolo tsa bona, kahoo re tsepamisa maikutlo mona ho utloisisa lisebelisoa tsa bokhoni ba bokooa le bo susumetsang.

Lethathamo 1

Mantsoe a moputso oa bohlokoa

Moloko oa bokooa o sebetsang o bonahala ka ho nahana hore hedonic biases ha e e-s'o ts'oaroe empa ho e-na le hoo ke lipolasetiki. Esita le tatso e 'ngoe e' ratang 'e monate e ka ba e sa thabiseng maemong a mang ha e ntse e lula e monate joaloka pele. Ka mohlala, pale e khethehileng ea li-romana e ka nkoa e le monate, empa e fetoha e nyonyehang ka mor'a hore tatso eo e sebelisetsoe ka tsela e tloaelehileng e kopantsoe le boloetse ba visceral ho etsa hore motho a ithute ho itšoara habonolo (; ; ). Ka lehlakoreng le leng, tatso e letsoai e nang le letsoai e sa khaotseng e ka fetoha e sa thabiseng ho fihlela e le monate, nakong ea takatso ea letsoai eo 'mele o haelloang ke sodium (; ). 'Me ka ho tšoanang, le hoja boko ba rona bo le bobebe ho lemoha litakatso tse utloisang bohloko ka ho khetheha, li-plastiki tsa hedonic li lumella batho ba bangata hore ba fumane litakatso tsa li-cranberries, kofi, biri kapa lintho tse ling tse bohloko ha e le hantle phihlelo ea setso e entse hore khalefo ea bona e be senotlolo sa hedonic mekhoa ea boko. Ntho e 'ngoe e fapaneng haholo empa e le bokahohleng, tlala e etsa hore lijo tsohle li be le' ho rata 'haholo, ha satiety e bolela hore e senya' linako tse fapaneng ka letsatsi le le leng, phetoho e matla ea hedonic e bitsoang 'alliesthesia' ().

Mesebetsi ea bokopi tsamaiso ea mekhoa ea ho hōla litekanyetso tsa botenya?

Ho ba le bothata ba ho nona haholo ho eketsehileng lilemong tse mashome a mararo tse fetileng USA, hoo kajeno hoo e batlang e le 1 ho ba 4 ba Amerika e ka nkoa e le bobebe (). Ho eketseha ha boima ba 'mele e ka ba ka lebaka la hore batho ba ntse ba ja lik'hilojule tse ngata tsa lijo, ho e-na le hobane ba se ba sa fokotsehe (). Ke hobane'ng ha batho ba ka 'na ba ja lijo tse ngata hona joale? Ha e le hantle, ho na le mabaka a 'maloa (; ; ). Litsebi tse ling li bontšitse hore liteko tsa morao-rao tsa ho ja le ho tsoela pele li ja li matla ho feta nakong e fetileng hobane lijo tsa nakong e fetileng li na le likhase tse phahameng tsa tsoekere, mafura le letsoai. Litloaelo tsa morao-rao li fumaneha habonolo ka nakoana leha e le efe sehatsetsing se haufi, mochine o rekisang lijo, reschorente ea lijo tse potlakileng, joalo-joalo. Meetlo ea meetlo e kileng ea fokotseha e fokotseha, e le hore batho ba je ka ntle ho lijo. Esita le ka hare ho lijo, boholo ba likarolo hangata bo kholo ho feta kamoo ho leng molemo kateng. Mekhoa ena kaofela e ka bapala ka mekhoa e tloaelehileng ea mekhoa ea moputso ea boko ka litsela tse re lumellang ho inehela ho takatso ea ho ja haholoanyane.

Boko bo 'ratang' le 'ho batla' tsamaiso e arabelang lintlheng tsena ke mokhoa o hloekileng oa 'go'. Li ts'oaroa ke litloaelo tse monate le tse amanang le tsona. Le ha 'ho ea' mekhoa e ka fokotseha ke tšusumetso ea satiety, ha ho mohla e hlahisang letšoao le matla la ho emisa hore li emise, li mpa li lata tlase ho 'go'. Ho thata ho reteleha ka ho feletseng. Ka mohlala, phuputso e entsoeng ka laborateng ea rona e kile ea fumana hore esita le bo-satiety bo boholo bo bakoang ke lebese le tsitsang kapa ho senya tharollo lipakeng tsa likhoto ho fihlela ba ja hoo e batlang e le 10% ea boima ba 'mele ka nako ea halofo ea lihora, ba fokotsoe empa ha baa ka ba felisa ba hedonic ba 'rata' liketso ho monate hang ka mor'a moo, 'me ha ho mohla ba sokolohileng' ho rata 'ho ba' dislike 'gape (negative)). Ka mokhoa o ts'oanang le batho, satiation e matla holim'a tsokolate ka ho kopa batho hore ba je ka mehala e mabeli e mengata ho hatelitse litekanyetso tsa ho rata ho ea haufi le zero empa ha aa ka a hatella litekanyetso ho se boemong bo sa rateheng, esita le haeba ho batla litekanyetso ho ile ha feta (; ). Ho na le mehlala e mengata ea mekhoa e fokolang ea bonyane ka mor'a hore motho a lule a e-na le bothata, empa a fane ka lintlha tse thatafatsang likhakanyo tsa tekanyo (), ho ka 'na ha e-ba ho sireletsehileng ho fihlela qeto ea hore menyaka ea lijo e thata ho felisa ka ho feletseng. U ka iphumana u iphumana u le teng ha u fumana li-dessert li ntse li ipiletsa esita le ka mor'a lijo tse kholo. 'Me ha o lapile, ho hlakile hore lijo tse natefisang li bile li khahlehang le ho feta.

Liteko tsena li tobana le motho e mong le e mong. 'Me lijo tse fumanehang haholoanyane le tse ngata haholoanyane tikolohong ea rona, hamonic' ho rata 'le' ho batla 'tsamaiso ea boko bo hlahisa' go. ' Ha e hloke hore ho kula ho fetele ho feta. Ebe ke eng e etsang hore batho ba bang ba etse joalo-ha ba bang ba sa etse joalo? Ho fapana hanyane ka hanyane ho fapana ha motho ka mokhoa o ts'oanang oa moputso ho ka etsa karolo ea ho eketsa ho nona haholo ho ba bang, joalokaha ho tla tšohloa ka tlase. Ha e le hantle, maemong a ho ja haholo, ho tla hlokahala litlhaloso tse eketsehileng.

Mesebetsi ea bokhoni ea bokhoni e ka fumanang mekhoa e metle ea botenya le mathata a ho ja

Maemong a fapaneng a ho nona ho tla ba le lisosa tse sa tšoaneng, 'me litlhaloso tsa saense mohlomong ha li na' tekanyo e le 'ngoe e lumellanang kaofela'. Ho thusa mokhoa oa motho ka mong le mefuta ea ho ja lijo tse ngata, ke litsela tse 'maloa tseo tsamaiso ea bokooa ba boko e ka amanang le botenya le mathata a amanang le ho ja.

Ho se sebetse ha moputso e le sesosa

Ntlha ea pele, ho ka etsahala hore likarolo tse ling tsa bokopi ba mosebetsi li tsamaee hampe ho baka ho ja lijo kapa ho kula ho itseng. Lijo li ka 'na tsa "rata" haholo kapa li nyane haholo ka moputso oa ho se sebetse. Ka mohlala, ho sebelisoa ha mafu a opioid kapa endocannabinoid hedonic hotspots ka nucleus accumbens le ventral pallidum e hlalositsoeng mona ka tlaase ho ka etsa hore liketso tsa 'ho rata' li ntlafatsoe ho latsoa monate ho batho ba bang. Ho ts'ebetsa ho feteletseng hoa 'ho rata' li-substrate ho tla matlafatsa tšusumetso ea hedonic ea lijo, ho etsa motho ka bobeli 'joaloka' le 'ho batla' lijo ho feta batho ba bang, 'me kahoo tlatsetsa ho ja lijo tse ngata le botenya haholo (; ). Ka lehlakoreng le leng, mokhoa o ferekanyang oa ho se sebetse ho hoholo ho ka 'na ha bonahala eka o fokotsa' ho rata 'ka ho tšoenyeha ha mofuta oa anorexia ().

Esita le ntle le thabo ea ho se sebetse, monyetla o mong oa ho senya moputso ke hore ho 'batla' ho ja ho ka 'na ha tsoha ka boeena, haeba ho ba le tšusumetso e matla e tsoang ho hedonic' ho rata '(; ). Ho khetholla ha 'ho batla' ho 'ho rata' mathateng a mang hoa bonahala hobane boko bo bonahala bo hlahisa 'ho batla' le 'ho rata' ka mekhoa e arohaneng, joalokaha e hlalositsoe ka tlaase. Cues bakeng sa lijo tse monate li ka 'na tsa etsa hore motho a' batle '' me a sebelisoe ka tsela e feteletseng le haeba a se a sa tsamaee ka ho toba, mohlomong ka tsela ea hyper-reactivity ho mesocorticolimbic dopamine-glutamate mekhoa ea matla a khothatsang (kapa li-CRF kapa lipotoloho tsa opioid tse ka khonang ho sebelisa mekhoa ena). Maemong a joalo, pono, monko, kapa ts'ebetso e hlakileng ea lijo li ka etsa hore motho a batle ho ja, le hoja motho a sa fumane phihlelo ea sebele ho feta kamoo e ka khahlehang kateng qetellong. Mantsoe ana ohle a 'nile a buelloa ka nako e' ngoe. E mong le e mong oa bona o tšoaneloa ke ho hlahlojoa hobane likarabo tse fapaneng li ka sebetsana le mathata a sa tšoaneng kapa mefuta e sa tšoaneng ea botenya.

Ka mokhoa o fokolang o khelosa mosebetsi oa moputso e le sephetho

Sehlopha sa bobeli sa menyetla ke hore mekhoa ea ho putsoa ha boko e ka 'na ea se ke ea e-ba eona sesosa sa pele sa ho ja, empa e ntse e sebetsa ka tsela e sa tloaelehang e le mokhoa o sa tloaelehang oa ho ba le lijo, tlhahiso e sa tloaelehang kapa boima ba' mele bo feteletseng. Maemong a joalo, mekhoa ea boko 'ea ho rata' le ea 'ho batla' e ka 'na ea leka ho sebetsa ka mokhoa o tloaelehileng, empa e bonahala e sa tloaeleha lithutong tsa maikutlo,' me kahoo e ka ba mofubelu o mofubelu o kenyelletsang bafuputsi. Leha ho le joalo, esita le mesebetsi e fokolang ea moputso e ka fane ka lifensetere tsa menyetla ea phekolo e ikemiselitseng ho lokisa boitšoaro bo itseng ka karolo ea ho tsamaisa moputso oa mosebetsi ho khutla ka har'a maemo a tloaelehileng.

Tšepo e tloaelehileng ea moputso oa boko

Ntlha ea boraro, ho ka khoneha hore maemong a mangata mekhoa ea bokoetliso ea boko bo tla tsoela pele ho sebetsa ka mokhoa o tloaelehileng ka botenya kapa bothata ba ho ja, 'me ha bo fetohe esita le ka bobeli. Maemong a joalo, lisosa tsa khathatso ea lijo li ka be li behile ka ntle ka ho feletseng mesebetsi ea moputso ea boko. Ka sebele, moputso oa bokooa o ka 'na oa sebetsa e le lithuso ho fihlela qetellong ho thusa ho itloaetsa mokhoa o itseng oa ho ja ho sa tsotellehe phekolo.

Na taba ea taba ke ea bohlokoa? Litholoana tsa liphello tsa meriana le phekolo

Karabo ea tse ling tsa menyetla e meng e molemo ka ho fetisisa e ka 'na ea fapana ho ea ka nyeoe ho ea ho nyeoe. Mefuta e fapa-fapaneng ea ho ja e sa tšoaneng e ka hloka likarabo tse fapaneng Mohlomong esita le batho ba fapaneng ba nang le bothata ba 'tšoanang' ba tla hloka likarabo tse fapaneng, bonyane haeba ho na le likaroloana tse fapaneng tsa mefuta e meholo ea mathata a ho ja hammoho le ho feta botenya ().

Karabo efe e ka holimo ke 'nete ka lefu le itseng la ho ja kapa mofuta oa botenya ho na le moelelo oa hore na mokhoa ofe oa phekolo o ka ba molemo ka ho fetisisa. Ka mohlala, na motho o lokela ho leka ho tsosolosa mokhoa o tloaelehileng oa ho ja ka ho fetola bokooa ba bokooa ka meriana? Seo se ka ba se loketseng haeba ho se sebetse ha moputso ke sesosa se ka sehloohong. Kapa na motho o lokela ho sebelisa lithethefatsi ho e-na le ho lefa meriana, eseng phekolo? Joale meriana e ka 'na ea ikemisetsa ho matlafatsa likarolo tsa mosebetsi oa moputso oa boko le ho ja ka tsela e nepahetseng, esita le ha u ntse u sa sebetsane le sesosa sa pele sa motheo. Seo se ka tšoana hantle le ho sebelisa aspirin ho phekola bohloko, le hoja sesosa sa pele sa mahlaba e ne e se tšenyo ea aspirin e sa feleng. Esita le ho tšoara letšoao ho ntse ho ka ba molemo.

Kapa ho e-na le hoo phekolo e lokela ho lebisitsoe ka ho feletseng mekhoeng e sa tsamaellanang le moputso oa lijo? Eo e ka 'na ea e-ba khetho e ntle ka ho fetisisa haeba boko ba mekhatlo e lefa mekhoa ea ho lula e le ntho e tloaelehileng maemong' ohle a ho kula, 'me mohlomong ha e le hantle ha e amane le mokhoa oa ho itima lijo.

Ho beha mekhoa ena ka lehlakoreng le leng ho thusa ho bontša hore ho na le tšusumetso ea meriana e tla latela ka kutloisiso e molemo ea lits'ebeletso tsa moputso oa boko le likamano tsa bona le mekhoa ea ho ja. Ke feela haeba motho a tseba kamoo lijo tsa moputso li sebetsanang kateng ka tloaelo bokong re tla khona ho lemoha lefu la bokooa bokong ba moputso. Hape haeba feela motho a ka lemoha mekhoa ea boipheliso ha e etsahala o tla khona ho etsa kapa ho khetha phekolo e molemo ka ho fetisisa.

Mekhoa e metle ea meputso ea boko bakeng sa lijo 'ho rata' le ho 'batla'

Lintho tsena li na le mabaka a ho leka ho utloisisa mekhoa ea boko e hlahisang 'ho rata' le 'ho batla' bakeng sa lijo, le hore na ba fetisetsoa joang ka tlala le ho lapa. Karolo ena e hlahlamang e fetohela liphuputsong tsa morao-rao mabapi le litsamaiso tsa motheo tsa boko tsa menyaka le lijo.

'Ho batla' ho arohane le 'ho rata'

Ho ka etsahala hore ka linako tse ling mekhoa ea bokooa ea ho 'batla' e ka susumetsa ho eketseha ha theko esita le haeba hedonic 'e rata' ha e phahame. Ka ho 'batla', re bua ka boikutlo ba ho susumetsa, mofuta oa bohlokoa oa khothatso (Setšoantšo sa 1). 'Ho batla' ho ameha haholo ka ho ja lijo, empa ho boetse ho na le lintho tse ling tse ngata. Khothatso e ka susumelletseha ho bōptjoa e le letšoao le hlahisitsoeng ka mahlo a mahlo a maikutlo le litlhaloso bokong ba tšusumetso e khethehileng, haholo-holo ba nang le mekhatlo ea Pavlovia le moputso. Boikarabelo ba ts'obotsi ea ts'usumetso ho ts'ebeliso ea boipheliso bo etsa hore ts'usumetso e khahlehang, ho hlokomeloa, ho batla le ho 'batla.' Tšusumetso e atlehang e fetoha makenete a tsosang takatso e hulang boitšoaro bo khotsofatsang ho bona (esita le haeba e le feela palo ea Pavlovia bakeng sa moputso), 'me e etsa hore moputso ka boeona o be o' batla '.

Setšoantšo sa 1 

Mohlala oa ts'usumetso e susumetsang meputso ea 'ho batla' (ho ba le boikutlo bo khothatsang) ho "rata" (tšusumetso ea hedonic ea menyaka ea maikutlo). Mohlala ona oa ts'usumetso e ts'ebetsong o ne o hlahisoa ke ...

Ha ho bakoa ke monko o tsoang ho pheheng, tšusumetso e matla e ka tsosa mohopolo oa motho mme ea tsosa menahano ea tšohanyetso ea ho ja - mme mohlomong le ho nahana ka ho hlaka hore lijo li ka etsa joalo ha ho se monko oa 'mele. Ha ho thoe likhoto li fana ka mohopolo bakeng sa moputso oa tsoekere, boikhohomoso bo ka etsa hore ntho e hlahelle e bonahale e tšoana le lijo ho motho ea e lemohang, e bile e ka etsa hore phoofolo e leke ka matla ho ja mohopolo oo e leng ntho ea tšepe e ke keng ea jeoa (haholo haeba rat Boko bo maemong a ts'ebetso ea maoto le matsoho ho holisa tšobotsi ea 'batlang') (; ; ; ).

Khothatso e matla kapa 'ho batla' e fapane hōle le mefuta e mengata ea litakatso tsa moelelo e boleloang ke lentsoe le tloaelehileng, le hlokang, le akarelletsang lipakane tse hlalosang kapa litlhoko tse hlakileng tsa liphello tsa nakong e tlang le tseo boholo ba tsona li leng lipakeng tsa lipotoloho tsa cortical. Ho ba le boikutlo bo matla ba ho khothatsa ho na le ho itšetleha ka ho tebileng ho li-cues le mahlaseli a marang-rang (kapa bonyane litšoantšo tsa lipolelo le lipolelo), leha ho le joalo ha ho hlokahale hore e be le litebello tse hlakileng tsa liphello tsa nakong e tlang tseo li batlang hore li be le lipatlisiso tsa lipotoloho tsa boko.

Phello ea matla a matla a khothatso e itšetlehile ka boemo ba boko bo kopanang le bona, hammoho le litloaelano tsa pele le moputso oa lijo (Setšoantšo sa 1). 'Ho batla' ho hlahisoa ke ho sebelisana ka bonngoe pakeng tsa boemo ba hona joale ba methapo ea mafu (ho akarelletsa le litlhoko tsa lijo) le ho ba teng ha lijo kapa litlhoko tsa bona. Hase lijo tsa lijo ka boeona kapa ho sebetsa ka matla ka boeona ke matla haholo. Empa hammoho ka likarolo tse nepahetseng, ba susumelletseha ho susumelletseha ho ba le ts'ebetso e kholo ho feta tekanyo ea likarolo ().

Kamano eo ea bonngoe e bolela hore ho 'batla' ka tšohanyetso ho phahama ha ho fumanoa lijo tsa lijo sebakeng sa mahlo a maholo (kapa haeba li-cues li hlakile ka nako eo). Ho ba teng ka mahlakoreng ke habohlokoa hobane ho na le setsoalle se phahameng le lijo. Ho ba le tlala ea tlhaho kapa ea ho hlaphoheloa kelellong ke habohlokoa hobane matla a susumetsang a ho kopana ha maikutlo a fetoha ka tlala kapa ho satiety (kapa e ka fapana ho batho ka bomong ka lebaka la ho se tšoane ha boko ba bona) ().

Ho hlahisa 'ho batla' ntle ho 'ho rata'

Pontšo e tsotehang ka ho fetisisa ea ts'usumetso e ts'ebetsong e le karolo e ikhethang e tsoa litsong tseo 'ho batla' ho 'nileng ha ntlafatsoa ka bomong ho le mong, ntle le ho hlahisa hedonic' ho rata 'moputso o le mong. Ho fumanoa ha rona ka lekhetlo la pele ho 'ho hloka'-ntle le ho' batla 'ho ile ha tla lilemong tse mashome a mabeli tse fetileng ho tloha ho ithuta ka ho ja ho hlahisoang ke ho tsosoa ha motlakase oa lateral hypothalamus ka likhoto, ho tsamaisanoa le Elliot Valenstein (). Ho ts'oanela motlakase ho lateral hypothalamus ho etsa hore litoe tse tsosolositsoeng li je ka matla (), 'me li-electrode tse joalo li sebelisa lipotoloho tsa boko tse tloaelehileng tse kenyelletsang ho lokoloha ha dopamine ea mesolimbic (). Tšusumetso e tšoanang ea electrode e atisa ho batloa ke liphoofolo e le moputso, mme ts'ebetso ea motlakase e ne e fetiselitsoe ho etsa hore ho jeoe ke ho eketsa tšusumetso ea hedonic ea lijo. Na likhoto tse tsosolositsoeng li 'batla' ho ja haholo hobane li 'ratile' lijo tse ngata? Mohlomong ho makatsang qalong, karabo e ile ea e-ba 'che': ts'ebetso ea electrode ea hypothalamic e ile ea hlōleha ho ntlafatsa liketso tsa 'liking' ho sucrose (joalo ka lipilomo tsa molomo, tse hlalositsoeng ka ho qaqileng ka tlaase mona), le hoja li-rats li ne li ja habeli lijo tse ngata joaloka tse tloaelehileng ()(Litšoantšo 2 & 3.) Ho e-na le ho eketsa 'ho rata', motlakase o matlafatsoa feela 'ho senya' (joaloka li-gap) hore o tsoele pele ho latsoa, ​​joalokaha eka, haeba ntho leha e le efe, sucrose e fetoha e sa thabiseng. Ts'ebetso ena le tse latelang tsa ho 'batla' ho tloha ho 'ho rata' ho supa tlhoko ea ho khetholla li-substrate tsa neural tse fapaneng bakeng sa mong le e mong. Re tla hlalosa ka ho latellana mekhoa ea bokooa ea 'ho batla' le 'ho rata', 'me u hlahlobe hore na litsamaiso tsena li amana joang le litsamaiso tse ling tsa tsamaiso.

Setšoantšo sa 2 

'Ho batla' ntlafatso e bakiloeng ke tlhahiso ea hypothalamic kapa ka ho phahamisa dopamine
Setšoantšo sa 3 

'Ho rata' bakeng sa monate ha ho mohla ho ntlafatsoang ke hypothalamic electrodes kapa ka ho phahamisoa ha dopamine

Mesolimbic dopamine 'ho batla' ntle le 'ho rata'

Monolimbic dopamine tsamaiso e ka 'na ea tsebahala ka neural substrate e ka ntlafatsang' ho batla 'ntle le' ho rata '. Ts'ebetso ea Dopamine e bakoa ke lijo tse monate, meputso e meng ea hedonic, le litlhoko tsa moputso (; ; ; ; ; ; ; ; ; ). Dopamine e 'nile ea bitsoa mofuthu oa methapo ea methapo ea mabaka ka mabaka a joalo, empa re lumela hore dopamine e sitoa ho phela ho latela lebitso la eona le tloaelehileng la hedonic.

Lilemong tse mashome a mabeli tsa lithuto tsa liphoofolo tse neng li etsa karolo ea ho etsa karolo ea dopamine, re 'nile ra fumana hore liphetoho tsa dopamine ha lia fetoha' ho rata 'tšusumetso ea hedonic ea meputso ea lijo ka mor'a tsohle, esita le ha' ho batla 'lijo ho fetoha haholo. Ka mohlala, dopamine e ngata bokong ba litoeba tsa motanteng tseo phetoho ea liphatsa tsa lefutso e bakang dopamine e eketsehileng hore e lule ka synapses (knockdown ea motlakase oa dopamine) e hlahisa 'ho batla' ho phahame bakeng sa lijo tse monate, empa ha ho holimo ho 'ho rata' lipolelo ho monate ()(Setšoantšo sa 2 & 3). Boemo bo tšoanang ba ho 'batla' ntle le 'ho rata' bo boetse bo hlahisoa ka likhoto tse tloaelehileng ka ho phahamisoa ha amphetamine ho dopamine release, le ka nako e telele-ho lemoha lithethefatsi tsa lisebelisoa tsa mahlo (; ; ).

Ka lehlakoreng le leng, litoeba tsa motanteng tse nang le dopamine leha e le efe ka boko ba tsona li ntse li khona ho ngolisa liphello tsa hedonic tsa sucrose kapa lijo tsa moputso, ka kutloisiso ea hore li ntse li khona ho bontša lithahasello, le tse ling tsa ho ithuta, bakeng sa moputso o monate o monate (; ). Ka ho tšoanang, ho latsoa lithuto tsa reactivity ho likhoto li bontšitse hore khatello ea dopamine ea pimozide (anti-antagonist) ea tsamaiso kapa esita le ka ho felisoa ha 99% ea mesolimbic le neostriatal dopamine neurons (ka 6-OHDA liso) ha e sitise litlhaloso ' ka tatso ea sucrose (; ). Ho e-na le hoo, tšusumetso ea hedonic ea monate e lula e le matla esita le ka pele ho nako e sa sebetseng.

Liphuputso tse 'maloa tsa phetoho ea mahlale ka batho le tsona li fumane hore litekanyetso tsa dopamine li ka' na tsa amahanngoa hantle le litekanyetso tse ikhethang tsa ho batla moputso ho feta ka litekanyetso tsa thabo tsa ho rata moputso o tšoanang (; ). Ha lithuto tsa batho tse amanang le tsona, lithethefatsi tse thibelang li-receptor tsa dopamine li ka fokotsa ka ho feletseng ho ipeha kherehloa ea boithabiso boo batho ba fanang ka bona moputso (; ; ; ).

Leha ho le joalo, kajeno ho na le tse ling tse hlahang dopamine = hedonia khopolo-taba libukeng tse nang le maikutlo a maholo le liphuputsong tse amanang le maemo a dopamine D2 receptor tlama (; ). Ka mohlala, liphuputso tse ling tsa PET tsa phetoho ea maikutlo li bontšitse hore batho ba bohale ba ka ba le li-dopamine tse fokolang tsa D2-binding sebopeng sa bona (; ). Haeba dopamine e etsa hore motho a thabe, joale ka dopamine = hedonia hypothesis, ho fokotsa li-receptor tse fokotsehileng li ka fokotsa menyaka eo ba e fumanang lijong. Monyaka o fokotsitsoeng o 'nile oa rereloa ho etsa hore batho bao ba je haholo ho fumana menyaka e tloaelehileng. Sena se 'nile sa bitsoa ho haella ha moputso khopolo-taba ea ho ja lijo tse matlafatsang ().

Ke habohlokoa ho hlokomela hore ho na le ho hong ho nang le bothata bo utloahalang le khopolo-taba e entsoeng ke anhedonia bakeng sa ho ja haholo. Ho bonahala eka ho hloka maikutlo a hore batho ba tla ja lijo tse ngata ha ba sa li rate ho feta ha ba li etsa. Haeba seo e ne e le 'nete, batho ba jeoang ke li-gruel tse sa tsitsang ba ka ja ho feta, ba re, batho bao lijo tsa bona li neng li akarelletsa li-ice cream, li-kaka le litapole. Ho e-na le hoo, batho le likhofu ba atisa ho ja lijo tse seng kae, le ho batla le ho ja haholo ha lijo tse teng li fumaneha haholoanyane (; ; ; ; ). Haeba ho haella ha dopamine ho entse hore lijo tsohle li se ke tsa e-ba molemo, batho ba ka 'na ba lebella hore ba je lijo tse fokolang ho feta ho feta, bonyane haeba molato o ka ts'ehetsa mokelikeli ka ho toba joalokaha o atisa ho bonahala. Lintlha tse hlakileng mabapi le ho ja le ho ba le bothata li bonahala eka li fapana le seo ho thoeng ke dopamine anhedonia formulation of fatness. Mantsoe ana a hlakileng a hlalosang lipapali tse hlalosang tse ka hlaselang ho haelloa ke moputso.

Ka lebaka leo, mekhoa e meng e lokela ho thabisoa. Ntho e 'ngoe e ka sebelisoang, e amanang le phetoho e fapaneng, tlhaloso ea ho fokotsa dopamine D2 e tlamisa batho ba maholo haholo ke hore ho fokotsa ho fumanoa ha lijo ke phello ea ho ja haholo le ho nona ho tlōla, ho fapana le sesosa sa eona (). Li-neurons tsa mesocorticolimbic circuits li ka arabela ka liphetoho tsa homeostatic ho khutlela mekhahlelo e tloaelehileng ha li qobelloa ke ts'ebetso e feteletseng ea nako e telele. Ka mohlala, ho pepesa nako e telele lithethefatsi tse lemalang ho qetella ho etsa hore li-receptor tsa dopamine li fokotsehe ka palo, esita le haeba maemo a ne a tloaelehile ho qala-ena ke mokhoa o tlaase oa tsamaiso ea ho mamellana ha lithethefatsi le ho tlohela (; ). Hoa utloahala hore haeba batho ba bang ba mahlahahlaha ba e-na le ts'ebetso e ts'oanang ea ts'ebetso ea dopamine, qetellong-melao ea litaelo tsa dopamine e ka hlahisa.

Haeba seo se etsahetse, khatello ea dopamine e ka 'na ea fela ha boima ba' mele bo feteletseng kapa tšebeliso e feteletseng ea moputso e emisoa. Boitsebiso bo bocha bo mabapi le mokhoa ona bo ka 'nang ba hlaha bo hlahile thuputsong ea morao tjena ea PET ea phetoho ea maikutlo, e ileng ea fumana hore roux-en-Y lijo tsa moriana li fetisetsoa ho buuoa, e leng se ileng sa etsa hore ho be le boima bo boima ba li-lbs 25 kamora libeke tse 6 ho basali ba bangata ba boima ba 200 lbs. ho khomarela ho hlaha ka mor'a ho buuoa ha ho hlaseloa ha dopamine ea D2 receptor e tlamang, e batlang e lekana le palo ea boima ba 'mele (). Ho nyoloha ha methapo ea dopamine ka mor'a ho lahleheloa ke boima ho lumellana le khopolo ea hore boemo bo botenya bo bakoa ke boemo bo ka tlase ba li-receptor tsa dopamine, ho e-na le hore ho haelloa ke dopamine ea innate kapa moputso oa bofokoli bo bakile botenya. Ka kakaretso, ha tse ling li ntse li tsejoa pele qeto e tiileng ea taba ena e ka fumanoa, ho na le mabaka a ho ba hlokolosi mabapi le khopolo ea hore ho fokotseha dopamine ho baka anedonia e bakang ho ja haholo.

Litholoana tse sa tsitsang tsa anorectic tsa dopamine (le liphello tse mpe tsa ho thibela dopamine)?

Leha ho le joalo, ho na le lintlha tse sa thabiseng bakeng sa khopolo ea rona ea hore dopamine e buisana le 'ho batla' lijo, 'me lintlha tseo li lokela ho amoheloa hape. Ntho e 'ngoe e sa thabiseng ke hore li-antipychotic tse kotsi tse thibelang li-receptor tsa D2 li ka eketsa lijo tsa caloric le ho etsa boima ba' mele (; ). Leha ho le joalo, tlhaloso ea sena e ka 'na ea bakoa haholo ke thibelo ea thibelo ka li-antipsychotics tse tšoanang tsa serotonin 1A le 2C receptors, le histamine H1 receptor, e ka kopanelang hantle le ho feta ho feta boima ba' mele ho feta D2 occupancy ().

Mohlomong 'nete ea bohlokoa ka ho fetisisa ke hore dopamine e tlalehoa hore e na le karolo e mpe le e fapaneng ho hatella takatso ea lijo, joalo ka liketso tsa lithethefatsi tse tsebahalang tsa ho ja lijo. Bonyane, tsamaiso ea amphetamine le lik'hemik'hale tse amanang le lik'hemik'hale tse khothalletsang dopamine le norepinephrine ka botšepehi li thibela takatso ea lijo le ho ja. Leha ho le joalo, bonyane liphello tse ling tsa anorectic tsa amphetamine li ka 'na tsa bakoa ke ho lokolloa ha norepinephrine, e nang le takatso e itseng ea ho hatella karolo ea hypothalamus ea mofuthu, mohlomong ka ho susumetsa alpha-1 -adrenoreceptors (e fapaneng le liphello tse bakoang ke li-receptors tsa alpha-2) (; ). Hape, ke habohlokoa ho hlokomela hore dopamine ka boeona e ka ba le liphello tse fapaneng ha ho kenngoa mekhoa e fapaneng ea boko, hape le ka matla a sa tšoaneng esita le ka mohaho o le mong (; ). Ka mohlala, dopamine e na le liphello tsa anorectic mokokoting oa hypothalamic arcuate, ka karolo e ka 'nang ea etsoa ka ho fokotsa lefu la neuropeptide Y (), 'me maemo a phahameng a dopamine a ka' na a e-na le liphello tsa anorectic hape le nucleus accumbens le neostriatum, le hoja maemo a tlase a ho phahamisa dopamine a ka fokotsa ho ja le ho 'batla' lijo (; ; ; ; ). Qetellong, hape ke habohlokoa ho hlokomela hore matšeliso a dopamine a ho ba le matla a ho susumetsa hangata a lebiselitsoe ho e ts'oarellang bakeng sa meputso - ho lumella hore cue e qale ho 'batla' bakeng sa moputso o lebisang ho phehella, ho e-na le ho fetisetsa ka ho toba boholo ba lijo le lijo (; ; ; ; ). Ho fokotsa 'ho batla' ho ka etsa hore motho a inehele tekong ea ho ja, 'me hang ha lijo li qalile tse ling (mohlala, opioid) mekhoa ea boko e ka fetisetsa boholo ba lijo ho tloha moo. Ka kakaretso, karolo ea dopamine ho kenngoa ha eona hase feela ka holimo kapa ka tlase, empa ho e-na le hoo e ka fapana ka mekhoa e fapaneng ea boko le tlas'a maemo a sa tšoaneng a kelello.

Mekhoa ea bokooa bakeng sa lijo 'e ratang'

Pelo ea moputso ke phello ea hedonic kapa boithabiso 'bo rata'. Libaka tse ngata tsa boko ke e tsositsoe ka menyaka ea lijo. Li-site tse nkiloeng ke lijo tse monate li kenyeletsa libaka tsa neocortex tse kang orbitofrontal cortex, e-na le li-cortex tse ka hare le li-insula tse kantle (; ; ; ; ; ; ; ; ; ; ). Libaka tse tsosolositsoeng tse thabisang li boetse li kenyeletsa mehaho ea li-forebrain tse kang li-ventral pallidum, nucleus accumbens, le amygdala, esita le mekhoa e tlaase ea boko ba lik'hemik'hale tse kang mesolimbic dopamine litekanyetso le mokokotlo oa parabrachial oa pons (; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ).

Ka cortex, sebaka sa orbitofrontal sa prefrontal lobe haholo-holo litaelo le monko oa monate. Pontšo e hlakileng ea fMRI ea coding hedonic e ka tsoa mosebetsing oa Kringelbach le basebetsi-'moho le eena (; ; ; ). Ka hare ho orbitofrontal cortex, sebaka sa mantlha sa coding sa hedonic se bonahala se le bohareng ba boemong ba pele, moo ts'ebetso ea fMRI e khethollang thabo e tsoang ho thepa ea lijo tse susumetsang lijo, 'me ho bohlokoa ka ho fetisisa, ho latela liphetoho ho monate oa tlhahiso e itseng ea lijo e bakoang ke alliesthesia kapa satiety e khethehileng ea maikutlo (; ). Ka mohlala, ha batho ba ne ba tšeloa ka ho noa litha e le nngwe ea lebese la tsokolate, thabo ea seno seo se khethiloe ka mokhoa o khethollang, 'me lerotholi lena le ile la hlahlojoa ka ho fokotsa ts'ebetso bohareng ba anterior orbitofrontal cortex, ha monyaka o ne o e-na le monate oa lero la tomate, e sa sebelisoe, e ile ea lula e sa feto-fetohe ().

Leha ho le joalo, ke habohlokoa ho hlokomela hore hase bohle ba sebetsang ka bokooa khoutu ho thaba lijo ke ntho e joalo sesosa kapa ho etsa thabo (). E le molao o akaretsang, ho na le litomoro tse eketsehileng tsa thabo boko ho feta lisosa tsa eona. Mesebetsi e meng ea boko e ka 'na ea e-ba ea bobeli,' me e ka baka tšusumetso, ho ithuta, ho lemoha kapa mesebetsi e meng e amanang le thabo. Ka ho khetheha, ha e e-s'o hlake hore na li-orbitofrontal kapa li-activation tse ling tsa cortical li phetha karolo e matla joang ka ho etsa hore ho be le lijo tse khahlisang lijo, kapa ho e-na le mesebetsi e meng (; ; ).

boko ho baka ea boikhathollo e ka tsejoa feela ka ho etsa hore ho sebelisoe karolo e itseng ea boko le ho fumana phetoho e ts'oanelang mofuteng o lumellanang le phetoho eo ha e qala. Re se re atamela bothata ba hedonic ka laboratori ea rona ka ho batla liketso tsa bokooa tse bakang keketseho ea liketso tsa kelello le boitšoaro ba 'ratang' lijong tse monate. Tsela e sebetsang ea 'ho rata' e sebelisoang lithutong tsa rona ho lekanya menyaka ea lijo le ho bakoa ke eona ke lipolelo tse amang maikutlo tse hlahisoang ke tšusumetso ea hedonic ea litakatso tse monate. Mokhoa ona oa sefahleho 'oa ho rata' o ile oa hlalosoa qalong ea bana ba masea ke Jacob Steiner 'me o fetisetsoa ho likhoto ke Harvey Grill le Ralph Norgren, ba sebetsa le Carl Pfaffmann (; ; ; ). Ka mohlala, litakatso tse monate li etsa hore lipolelo tse ntle tsa 'ho rata' li ngotsoe ka sefahleho (lipina le lipuo tse latellanang tse hlabang molomo, joalo-joalo) ho masea a bana le litoeba, empa ho e-na le hoo, ho rata lintho tse bohloko ho etsa hore lipolelo tsa liphatsa tsa 'mele li senyehe (li-gap, joalo-joalo)Setšoantšo sa 4 & 5). Ho tiisa tlhaho ea hedonic, liphetoho tsena tse amang maikutlo ka tsela e ikhethileng liphetohong tsa litebello tsa monyaka o susumelitsoeng ke litlhokofatso tsa tlala / satiety, lithahasello tse ithutoang kapa liphihlelo, le liphetoho tsa boko (; ; ; ; ; ; ; ). Liketso tsa 'ho khahloa ke sefahleho' ke homologous pakeng tsa batho le liphoofolo tse ling tse phofshoang (; ; ; ) e leng se bolelang hore se ithutoang ka mekhoa ea bokooa ea ho thabela menyetla ea lithuto tsa liphoofolo e thusa ho utloisisa moloko oa menyaka ho batho (; ; ).

Setšoantšo sa 4 

Li-hotspots tsa Hedonic le lipotoloho tsa hedonic
Setšoantšo sa 5 

Tšoara 'litakatso' tsa ho latsoa le 'mapa oa nucleus accumbens hotspot

Se seng se hlahile morao tjena liphuputsong tsa ho "rata" mekhoa le mekhoa ea methapo ke boitsebiso ba boko bo nang le li-hedonic li-hotspots tse nang le lihlopha tse ka sehloohong tse bakang ho 'rata' le ho 'batla' hammoho bakeng sa mehloli ea lijo (Litšoantšo 4 'me Le5) .5). Li-hotspot li theha marang-rang a lihlekehleke tsa bokooa joaloka sehlekehlekeng se kopantsoeng li-forembrain le bokhoni ba bokooa (; ; ; ; ; ; ). Li-hotspots tsa Hedonic li 'nile tsa fumanoa ho fihlela joale nucleus accumbens le ventral pallidum,' me li bontšoa hore li teng libakeng tse tebileng tsa boko ba lik'hemik'hale tse kang mokokotlo oa parabrachial pons; mohlomong tse ling tse sa netefatsoang li ka ba teng sebakeng sa amygdala kapa libakeng tsa cortical tse kang orbitofrontal cortex (; ). Re lumela hore libaka tsena tse arolelanoang 'ho rata' li sebelisana hammoho e le hore li sebetse joaloka potoloho e le 'ngoe e' ngoe ea 'liking', e sebetsang haholo ka taolo ea mahlahahlaha ho pholletsa le litekanyetso tse kholo tsa boko (; ).

Li-hotspots tsa forebrain, tse khethiloeng ka nucleus accumbens kapa ventral pallidum, li etsa karolo e ka holimo ea bolaoli ba neural hedonic, joalokaha bo tsejoa ho fihlela joale, ka ho hlahisa liketso tse amanang le lik'hamphani tse theohelang ho bokong ba boko. Ka laboratori ea rona, re hlokometse hore opioid kapa endocannabinoid drug microinjection ka forebrain hedonic hotspot e hlahisa palo ea ho "rata" orofacial reactions e entsoeng ka monate o monate (ha ho thibela kapa ho siea 'ho hanyetsa' liphetoho 'sa fetoha) sa fetoha). E le ho thusa ho hlahisa lisebelisoa tsa 'liking' tse qalileng tse nkiloeng ke microinjection ea lithethefatsi, re ile ra hlahisa sesebelisoa sa 'Fos plume' ho lekanya hore na lithethefatsi tse nyenyane li ata hakae ho etsa hore li-neurons li sebelise bokong. Microinjection ea lithethefatsi e tsamaisa mosebetsi oa li-nerur tse haufi. Ho ngolla li-neurone bakeng sa protheine ea pele ea liphatsa tsa lefutso, Fos, e bontša marang-rang a neuronal, 'me e hlalosa sebaka se sebetsang hantle se nang le serame se potolohileng sebaka sa ente (Setšoantšo sa 5). Sebaka seo se ka fuoa boikarabello bakeng sa ntlafatso efe kapa efe ea hedonic e bakoang ke microinjection ea lithethefatsi. Meeli ea Hotspot e tsoa ho bapisoa le limmapa tsa mapolanka bakeng sa libaka tse nyenyane tsa microinjection tse atlehileng ho ntlafatsa 'ho rata' ho latela tse haufi le tsona tse hlōlehileng. Mokhoa ona o thusa ho fana ka thabo ho libaka tsa boko ba nang le boikarabelo.

Nucleus accumbens hotspot

Sebaka sa pele sa hotspotse se fumanoeng se fumanoe ka hare ho nucleus accumbens, moo se sebelisang lipontšo tsa opioid le endocannabinoid ho eketsa tatso 'e ratang' (Setšoantšo sa 4 & 5). Sebaka se seholo se lutse sebakeng se arohaneng le khetla ea shell ea nucleus accumbens: ka ho khetheha, ka li-cubic-millimeter boholo ba lisele tse kentsoeng ea rostrodorsal ea khetla e kholo. Sebakeng sa hedonic hotspot, 'ho rata' bakeng sa monate ho eketsoa ke microinjection ea lithethefatsi tse etsisang li-opioid tse mamellang kapa li-endocannabinoid tsa neurochemical. Sena se lumellana le tlhahiso ea bafuputsi ba 'maloa ba neng ba nahana hore tlhahiso ea li-opioid kapa ea cannabinoid receptor e etsa hore ho be le takatso ea lijo ka ho eketsa' ho rata 'bakeng sa ho utloisisa lijo (; ; ; ; ; ; ; ; ; ; ; ; ; ; ). Liphello tsa rona li tšehetsa maikutlo ao a hedonic, 'me, ho latela li-substrate tse itseng tsa boko, li thusitse ho fumana libaka tsa boko tse ikarabellang bakeng sa ntlafatso ea monyaka ho li-hotspots tse itseng. Liphuputso tse etelletsoeng ke Susana Peciña, laboratori ea rona pele, li fumane sebaka sa li-cubmeter hotspot sekhopong, ho sebelisa microinjection ea lithethefatsi tsa opioid agonist (DAMGO; [D-Ala2, N-MePhe4, Gly-ol] -enkephalin). DAMGO e khetha ka ho hlaka mofuta oa opioid receptor, 'me hotspot ena e bonahala e lekane ho ntlafatsa thabo e khanyang e entsoeng ke boko ka monate o monate (; ; ; ). Makhetlo a fetang a mabeli a tloaelehileng a likarabo tse ntle tsa 'liking' a ne a tlohelloa ho noa tatso ka likhoto tse nang le DAMGO microinjection libakeng tsa tsona tse holimo. 'Ho nyatsa' liketso tsa quinine ha ho mohla ho kileng ha ntlafatsoa, ​​empa ho e-na le hoo ho ne ho hatelloa ka ho khanya ha opioid hohle le ho potoloha ho hopotpot. Kahoo menyaka e monate e ntlafatsoa, ​​'me ho halefisoa ke khalefo hoa fokotsoa ka nako e le' ngoe, ka ho susumetsoa ha methapo ea pelo ea hedonic hotspot.

Li-endocannabinoids, lik'hemik'hale tsa boko tse tsoanang le ts'oaetso ea tetrahydrocannabinol ea marikoana, li na le li-hotspot tsa tsona tsa hedonic nucleus accumbens shell eo ka tloaelo e koahelang ka holimo ho opioid hotspot. Phuputso e entsoeng ke Stephen Mahler le Kyle Smith ka laborateng ea rona e fumane hore anandamide, e leng endocannabinoid eo ho ka etsahala hore e sebetse bokong ka ho susumetsa mofuta oa CB1 oa receptor ea kankere, e ka sebetsana le nucleus accumbens hotspot ka tsela e tšoanang le lithethefatsi tsa opioid ho phahamisa tšusumetso ea thabo ea sucrose tatso (; ). Anandamide microinjections ho hotspot ka makhetlo a mabeli a mabeli a mabeli a 'maloa' a etsang liketso tse ntle tse hlahisang litlatse, tse kang ho ts'oaea ha li-opioid, empa hape ho itšoara habonolo ho tatso e bohloko ha hoa ntlafatsoa. Ntho e 'ngoe e thahasellisang e ka' nang ea hokahanya le ho ntlafatsa lits'ebetso tsena ke ho hopotpot ea shell ke hore lipontšo tsa opioid le endocannabinoid li ka sebelisana kapa tsa sebelisana. Anandamide o khothalletsoa hore a nke karolo e le mokokotlo oa mothapo oa mali, o ka lokolloa ka sekhahla se seholo sa neuron sekhethong sa ho khutlela morao ho li-terminon tse haufi tsa presynaptic axon le ho tsosolosa li-receptor tsa CB1, mme mohlomong o lokolla ho lokolloa ha opioid pele ho synaptic (; ; ). Ka ho ts'oanang, matšoao a opioid a otlang se-spin neonone ea post-synaptic ka shell e ka kopa ho lokolloa ha endocannabinoid. Liphuputso tsa nakong e tlang li ka khona ho hlahloba hore na matšoao a endocannabinoid le opioid a sebelisana joang ka mekhoa e joalo ea likarabo tse sebetsang.

Leoatle le leholo la opioid la 'ho batla' ka nucleus accumbens

Ntle ho ho eketsa 'ho rata', microinjection ea DAMGO kapa anandamide sebakeng se tšoanang sa accumbens hotspot hape ka nako e le 'ngoe' me ka ho toba e etsa hore 'ho batla' ho jeoe, ho bontšoa ke keketseho e matla ea ho ja lijo. Empa likarolo tse ling tse haufi tsa nucleus accumbens li etsa feela 'ho batla' ha li sebelisoa ke li-opioids, ntle le ho ntlafatsa 'ho rata' (Setšoantšo sa 5). Ha e le hantle, ha ho fokola ha opioid ho ea holimo ho li-cubmeter hotspot ho na le bokhoni bo ikhethang ba hedonic ho phahamisa 'liking' (ha ho bapisoa le, ho re, dopamine neurotransmission), ho susumetsa opioid ka ntle ho hotspot hase hedonic, 'me ho etsa feela ho' batla 'ntle le ho rata '(ka linako tse ling le ho fokotsa' ho rata '). Ka mohlala, ho hopotpot ea opioid hedonic e na le feela 10% ea kakaretso ea accumbens, esita le 30% feela ea khetla ea eona e kholo. Leha ho le joalo DAMGO microinjection ho pholletsa le 100% ea shell e kholo e eketsehile 'ho hloka', ho feta ho belaella hore na lijo li ja hakae. DAMGO e eketsa 'ho batla' ka tsela e atlehileng esita le ho 'coldspot' e 'ngoe ea posterior moo microinjections e tšoanang e sitisang' ho rata 'ka tlaase ho tloaelehileng (). Tlhahiso ea Hedonic e thibetsoe ke likokoana-hloko ho ea ho li-hotspots, hammoho le li-neurochemically ho li-opioid le endocannabinoid (). Mokhoa o atolositsoeng haholo oa ho "batla" o lumellana le liphuputso tse fetileng tseo li-opioid li susumetsang lijo ho 'batla' ho pholletsa le nucleus eohle e sebetsang le esita le mehahong e ka ntle e kenyelletsang amygdala le neostriatum (; ; ; ; ). Bongata ba libaka tseo opioid li ka 'na tsa se ke tsa e-ba hedonic.

Na neostriatum e kenyelletsa 'ho batla' kapa 'ho rata' moloko?

The ventral striatum (nucleus accumbens) e tumme ka lebaka la tšusumetso, empa morao tjena dorsal striatum (neostriatum) e kentse letsoho molemong oa lijo le moputso (ho phaella mosebetsing o tummeng oa ho itšireletsa ka maoto) (; ; ; ; ). Ka mohlala, dopamine neurons e hlahisang neostriatum litontsong tsa litšoane li fana ka liphoso tse boletsoeng esale pele (meputso e sa tsejoang ea lero) ka tsela e tšoanang le ea dopamine neurons e nucleus accumbens (). Dopamine ea batho e lokolloa dorsal striatum e tsamaisana le takatso e hlahisoang ke ho shebella lijo kapa lithethefatsi (liphuputsong tse ling, li kopane haholo ho feta ventral striatum) (; ; ). Neostriatal dopamine e hlokahalang ho hlahisa boitšoaro bo tloaelehileng ba ho ja, ha lijo tsa ho ja li khutlisetsoa metsong e fokolang ea dopamine e senyehileng ka ho fetola dopamine ho neostriatum (; ).

Ka mokhoa o ts'oanang, tlhahiso ea opioid ea neostriatum e ka etsa hore lijo li jeoe, bonyane karolong ea ventrolateral (). Ho holisa sephetho sena, re sa tsoa fumana hore libaka tse ling tsa neostriatum le tsona li ka kenella ho keneng ha lijo tse matlafalitsoeng ke opioid, ho kenyeletsoa le likarolo tse kholo tsa neostriatum. Haholo-holo, seo re se bonang se fana ka maikutlo a hore ts'usumetso ea opioid ea dorsomedial quadrant ea neostriatum e ntlafatsa phepelo ea lijo tse monate (DiFeliceantonio le Berridge, maikutlo a motho ka mong). Phuputsong ea haufinyane ea lifofane, re hlokometse hore likhoto li jele pheko ea chokolete makhetlo a fetang a mabeli (lipompong tsa M&M) kamora ho amohela li-microinjection tsa DAMGO ka dorsomedial striatum ho feta kamora taolo ea li-microinjection tsa koloi. Kahoo liphetho tsa rona li tšehetsa mohopolo oa hore le likarolo tse kholo tsa neostriatum li ka nka karolo ho hlahiseng tšusumetso ea tšusumetso ea ho ja moputso oa lijo (; ; ; ; ).

Ventral pallidum: jenereithara ea bohlokoa haholo ea 'ho rata' lijo le 'ho batla'?

The palral pallidum e batla e le ncha libukeng tsa lihlopha tsa maoto, empa ke sepheo se ka sehloohong sa litsamaiso tsa nucleus accumbens tse builoeng ka holimo, 'me re lumela hore ke tsa bohlokoa ka ho khetheha ho susumetsa ts'ehetso le thabo ea lijo (; ; ; ; ; ; ). The palral pallidum e na le sebaka sa eona sa cubic-millimeter hedonic hotspot ka mor'a halofo ea eona ea morao, e leng bohlokoa ka ho fetisisa bakeng sa ho boloka litekanyetso tse tloaelehileng tsa moputso 'ho rata' hammoho le ho ntlafatsa 'ho rata' maemo a phahameng (Setšoantšo sa 4). Pono ena e itšetlehile haholo ka lithuto tsa laborateng ea rona ka Howard Cromwell, Kyle Smith le Chao-Yi Ho (; ; ; ; ), le lithuto tse kopanetsoeng le Amy Tindell le J. Wayne Aldridge (; ), 'me e lumellana le litlaleho tsa bafuputsi ba bang (; ; ; ; ; ; ; ; ).

Bohlokoa ba ventral pallidum bo bontšoa ke 'nete e tsotehang ea hore ke eona feela sebaka sa boko se tsejoang haholo ho fihlela moo lefu la neuronal le felisang liketso tsohle' tse lakatsang '' me li li nkela ka 'ho senya' esita le monate (bonyane ka nako e telele libeke) (). Mantsoe ana a ka 'na a makatsa babali ba hopolang ho tseba hore lateral hypothalamus e ne e le sebaka seo lisoalo se bakang likhase tse matla ho lijo (; ), ka hona tlhaloso e itseng ke e le hore. Le hoja likokoanyana tse kholo tsa lateral hypothalamus li se li tsebahala ka nako e telele ho senya liketso tsa 'ho rata' hammoho le ho ithaopela ho ja le boitšoaro ba ho noa (; ), litlhokofatso tse thabisang tsa lithuto tse tsoang ho 1960s le 1970s hangata li senyeha hamorao feela hypothalamus empa hape li senyeha ka ventral pallidum (; ; ).

Phuputso e entsoeng ka lehlakoreng le ho feta ka laboratori ea rona ea Howard Cromwell e ile ea etsa qeto ea hore ts'oaetso e ne e latela feela lisoe tse bakileng tšenyo ea ventral pallidum (pele le ho latellana le lateral hypothalamus), tse neng li senya feela lateral hypothalamus ha lia ka tsa lebisa moferefereng (). Lithuto tsa ho latela litlaleho tsa Chao-Yi Ho li laboring tsa rona tsa morao tjena li tiisitse hore lefu la neuronal ka posterior ventral pallidum le hlahisa sucrose 'ho senya' 'me e felisa likarabo tsa' ho rata 'ho monate ka matsatsi ho libeke ka mor'a hore litsi (). Ho ba le ts'oaetso e joalo e hlahisoa ke le ho thibela nakoana nakoana ka hotspot e tšoanang (ka microinjection ea GABA agonist muscimol) (; ). Ka hona, palralum ea ventral e bonahala e hlokahala haholo-holo ho potoloha sepakapaka bakeng sa monate o tloaelehileng oa 'ho rata'.

Hotspoton ea hedonic ea ventral pallidum e ka boela ea eketsa 'ho rata' lijo bakeng sa lijo ha li bakoa ke kankere ea mali (; ; ). Liphuputso tsa Kyle Smith ka laborateng ea rona pele li bontšitse hore holong ea hedonic ea ventral pallidum, hoo e ka bang karolo ea lik'hilograma-millimeter mokokotlong oa sebopeho, microinjection ea opioid agonist DAMGO e bakile tatso ea sucrose ho etsa hore batho ba 'rate' liketso tse tloaelehileng () Ts'ebetso ea li-opioid ka morao-pele ea ventral pallidum le eona e entse hore likhoba li je ka makhetlo a mabeli a lijo. Ka lehlakoreng le leng, haeba opioid microinjections e ts'oaretsoe ka ntle ka ntle ho hotspot ka pele ho ventral pallidum, ha e le hantle e ile ea hatella hadonic 'ho rata' le 'ho batla' ho ja, e lumellanang le monyetla oa sebaka se hlahisang litšila sebakeng sa pele halofo ea palralum ventral (; ). Liphello tsena li bonts'a ho hohela, 'me ho bonahala eka li lumellana le liphuputso tsa li-laboratories tse ling tse' maloa ka bohlokoa ba liketso tsa ventral pallidum lijong, lithethefatsi le moputso o mong (; ; ; ; ; ; ).

Orexin hedonic hotspot ho ventral pallidum?

Na ho na le li-neurotransmitter tse ling tsa hedonic tse ka hare ho ventral pallidum hotspot e ka matlafatsang 'ho rata' liketso? Motho ea ts'episitsoeng ka botšepehi ke orexin, eo ho nahanoang hore e amana le tlala le moputso sebakeng sa lateral hypothalamic (; ). Orexin neurons e tsoang ho hypothalamus ho ventral pallidum, haholo-holo sebaka sa eona sa posterior se nang le opioid hedonic hotspot (). Ventral pallidum li-neurons li fumana lihlahisoa tsa orexin ka ho toba, 'me ho latela li-receptors tsa orexin ().

Litholoana tsa lipatlisiso tsa morao-rao ka laborateng ea rona li bontša hore orexin ka palralum ea ventral e ka ntlafatsa ho "rata" bakeng sa meputso e metle (). Chao-Yi Ho o fumanoe hore microinjection ea orexin-A sebakeng se le seng sa morao holimo ha opioid hedonic hotspot ea ventral pallidum e eketsa palo ea 'ho rata' ho itšoara ho latsoa tatso. Li-orexin microinjections ka ventral pallidum li hlōleha ho eketsa likarabo tse mpe tsa 'ho hanyetsa' ho quinine, ho bonts'oa hore ke feela lintho tse ntle tsa monyaka o ntseng o ntlafatsoa mme ha se litsebe tsohle -). Ha ho ntse ho hlokahala lithuto tse ling, liphello tsena tsa pele li fana ka maikutlo a mokhoa oo litlamo li bolelang hore li ka etsa lijo tse monate li latsoa le ho feta, mohlomong ka li-orexin hypothalamus-to-ventral-pallidum link.

Tlhaloso ea ho qetela ea hore ventral pallidum e ama phetoho ea hedonic ea 'ho rata' maikutlo ke hore ho thunngoa ha li-neurone ka khomphuteng ea post-hedonic hotspot 'ho rata' bakeng sa melemo e monate, e letsoai le e meng ea lijo (; ; ; ; ; ; ). Li-neurons ho hotspot ea ventral pallidum mollo ka potlako ha likhoto li ja pellet ea tsoekere, kapa li bile li kopana le mohloli oa moputso, joalo ka ha li lekanngoa ke li-electrodes tsa ho rekota tse sa feleng (; ). Ho chesoa ha li-sucrose-tse hlahisitseng li-neurone ho bonahala ho totobatsa ka ho khetheha hedonic 'ho rata' bakeng sa tatso (). Ka mohlala, ventral pallidal neurons e chesa ha tharollo ea sucrose e kenngoa molomong empa li-neuron tse tšoanang li ke ke tsa chesa tharollo ea NaCl e nang le salate ka makhetlo a mararo ho feta metsi a leoatle le ho sa thabiseng ho noa. Leha ho le joalo, li-neurons tsa ventral pallidum hotspot ka tšohanyetso li qala ho chesa ka tatso ea metsi a mararo a leoatle haeba boemo ba 'mele ea lijo tsa letsoai bo bakoa ke likhoto (; ) ka ho fana ka furosemide le deoxycorticosterone e le lithethefatsi ho etsisa li-hormone sodium-depletion lipontšo tsa angiotensin le aldosterone (), le ho eketsa seo 'se se ratang' bakeng sa tatso e matla haholo ea letsoai (; ). Ka hona, neurons ka lentsoe la ventral pallidum li latsoa monate ka tsela e utloisisang tlhokahalo ea mmele ea motsotso. Tlhokomeliso ea hore li-neuron tseo tsa hedonic li le sebakeng se tšoanang sa hedonic moo ho ts'oaroa ha opioid ho etsa hore liketso tsa 'ho rata' ho latsoeha hamonate li bontša hore tekanyo ea bona ea ho thunya e ka ba karolo ea mochine o hlahisang thabo e khaphatsehang holim'a maikutlo a tatso ().

Nyeoe e 'ngoe eo palralum ea ventral e ka ntlafatsang' ho batla 'ntle ho' ho rata 'e bonoa ka mor'a ho thibela li-neurons tsa GABA ka ventral pallidum, (). Kyle Smith o ile a tšoaea mohanyetsi oa GABA, bicuculline, e ileng ea lokolla li-neurons ho tloha khatellong ea tonyo ea GABAergic, mohlomong e ba thusang hore ba sebelisoe ke motlakase ka mokhoa o tšoanang le o motlakase. Sephetho sa kelello sa popolarization ea ventral e ne e batla e tšoana le ea stimulating electrode lateral hypothalamic electrode stimulation. Ho ja lijo ho ne ho habeli empa ho ne ho se na keketseho e 'ngoe ea' ho rata 'ho latsoa tatso (ho fapana le ts'oaetso ea opioid ka DAMGO microinjections setsing, e ileng ea eketsa' ho batla 'le' ho rata 'hammoho) ().

Sebaka se kopanetsoeng sa nucleus accumbens le li-hotspots tsa ventral pallidum

Hase feela hore nucleus accumbens le ventral pallidum li na le li-hotspots tsa hedonic tseo ho tsona ho tsosolosa ha opioid ho matlafatsa 'ho rata,' empa li-hotspots tse peli li sebetsa hammoho ho theha marang-rang a ho hokahanya 'ho rata' (). Mosebetsing o etsoang ka laborateng ea rona, Kyle Smith o fumane hore microinjections ea opioid agonist ho e 'ngoe ea hotspot e sebelisitsoe haufi le Fos polelo e' ngoe sebakeng se seng, e leng se bontšang hore sebaka se seng le se seng se sebelisana le ho ntlafatsa hedonic 'ho rata'. Ho phaella moo, thibelo ea opioid ka naloxone ka leha e le efe ea hotspot e ka felisa 'ho rata' ho eketsehileng e hlahisoang ke DAMGO microinjection ho e 'ngoe, e bontšang hore ho nka karolo e le' ngoe ho ne ho hlokahala. Litlhaloso tse joalo li bontša hore li-hotspots tse peli li kopanngoa ka mokhoa o le mong ho potoloho e 'ngoe e' ngoe e 'ratang,' 'me potoloho eohle e hloka ho phahamisa tšusumetso ea hedonic. Leha ho le joalo, ho bokella ho sebetsa ka bohona ho ka eketsa 'ho hloka' 'me ho ja lijo ho sa tsotellehe ho kenya letsoho pallidal (le ho sa tsotellehe hore na' ho rata 'ho ts'oaroa ka nako e le' ngoe) ().

Ho kopanya boko le boits'oaro ba tsamaiso

Khatelo-pele e kholo e entsoe lilemong tsa morao tjena mabapi le litlhaloso tsa neural lipakeng tsa mesocorticolimbic system systems le mekhoa ea tsamaiso ea hypothalamic ea tlala ea caloric le satiety (; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ).

Joale tlala e ka 'na ea eketsa lijo joang "ho rata" ka alliesthesia (; ), kapa ho ntlafatsa 'ho hloka' ho etsa hore lijo li be tse khahlehang haholoanyane? Hona ho se tšoane ha motho ka bomong ho ka kopana joang le sena ho hlahisa mathata a ho ja kapa botenya ho batho ba bang? Ho na le mekhoa e mengata e tšepisang ea ho sebelisana joalo. Re tla nahana ka bokhutšoanyane ka ba 'maloa mona.

Lijo e le matla a matla a susumetsang nakong ea tlala

Ntho e 'ngoe e ka' nang eaba ke ho phahamisa 'ho batla' lijo ka ho toba nakong ea tlala, 'me mohlomong ho phahamisa khahloa eo ho batho ba bangata haholo. Ho batho, ts'ehetso e matla ea lijo bakeng sa lijo e lekantsoe liphuputsong tse ling ka maeto a mahlo a tsamaisitsoeng ka potlako kapa ka nako e telele kapa hangata ho bona lijo, kapa ka mehato e amanang le eona. Ka mohlala, batho ba mahlomoleng ba 'nile ba tlalehoa hore ba tla lebisa tlhokomelo ea bona haholoanyane mahlong a lijo ho feta batho bao e seng batho ba bolileng, haholo-holo ha ba lapetse (). Tlaleho e 'ngoe e fana ka maikutlo a hore tlala e phahamisa matla a ho ba le lijo tse matlafatsang boemong bo tloaelehileng ba boima le batho ba bobebe, joalo ka ha ho bonahale ka ho eketseha ha nako e telele, empa batho ba feteletseng ba na le litekanyetso tse phahameng tsa matla a khothatsang bakeng sa litšoantšo tsa lijo le ha ba sa tsoa ja (). Bohlale bo matla ba ho ba le litšoantšo tsa lijo bo ka 'na ba amana le maikutlo a tloaelehileng a tsoang sechabeng sa psycholose eo ho nona ho tlōla ho amanang ka ho feteletseng kapa ho itšoara ka tsela e feteletseng ho susumelletseha (; ).

Li-alliesthesia tsa opioid nakong ea tlala?

Ka ho tšoanang, hedonic 'ea ratang' lijo e ntlafatsoa nakong ea tlala. Ts'ebetso ea opioid e ts'ebetsong ea li-hedonic hotspots ke mokhethoa ea ka sehloohong oa ho etsa hore lijo li latsoe hantle nakong ea tlala. Haeba tatso ea lijo ha e lapile e ntša tokoloho e phahameng ea opioid e matla ho susumetsa li-receptors, lijo li ne li tla latsoa hantle ho feta ha li sate. Mang kapa mang ea neng a e-na le mokhoa o feteletsang oa mokhoa ona oa hedonic o ne a tla fumana lijo ho latsoa haholo-holo tse ntle. Bakeng sa mokokotlo oa nucleus accumbens, re nahana hore tlhaho ea tlhaho ea opioid e ka 'na ea hlaha ka tlhaho ea tlhaho ea enkephalin. Endogenous B-endorphin ke mokhoa o atlehang haholoanyane oa ho amohela li-opioid receptors ho feta enkephalin, mme B-endorphin neurons e khothalletsoa hore e hlahe ho tloha hypothalamus ho ea ho mehaho e meng ea limilamo (; ), empa li-endorphins li ka 'na tsa se ke tsa e-ba teng ka shell e lekaneng ho phethahatsa mosebetsi ona (SJ Watson, puisano ea motho ka mong, 2009). Ka lebaka leo, enkephalins, ho e-na le B-endorphin, e ka 'na ea e-na le letšoao le fumanoang ka ho fetisisa ka-opioid sekheng sa nucleus accumbens shell. Enkephalin e tsoa ho batho ba bangata ba methapo e meholo ka hare ho khetla (baahi ba hlahisang enkephalin mRNA hammoho le li-receptors tsa D2 le GABA mRNA), hammoho le li-neurons tse hlahang ho tsoa ventral pallidum le mehaho e amanang le eona e fanang ka GABA le lipontšo tsa enkephalin.

Ntho e tsotehang ea hypothalamic-thalamic-e bokella potoloho ea boko bo matla ho matlafatsa likontšo tsa enkephalin nucleus accumbens shell nakong ea linaha tsa caloric tlala e ileng ea khothalletsoa ke Ann Kelley le basebetsi-'moho le eena (). Kelley et al. o ile a etsa tlhahiso ea hore li-orexin neurons li sebelise morero oa lateral hypothalamus ho etsa hore li-glutamate neurons li se ke tsa e-ba teng mokokotlong oa thalamic. Ka lehlakoreng le leng, morero oa thalamic paraurricular neurons ho nucleus accumbens shell moo ba sebelisang lipontšo tsa glutamate ho thabisa li-interneurons tse kholo tsa acetylcholine. Kelley le basebetsi-'moho ba ile ba etsa tlhahiso ea hore qetellong li-acetylcholine neurons li khetholle ka ho khetheha li-enkephalin neurons. Li-neurons tse lokollang enkephalin li lokela ho kenyeletsa kahare ho li-shell tsa methapo ea li-hedonic tsa shell e kholo (ka mokhoa o makatsang, masimo a li-acetylcholine neurons a boholo ba boholo ba 1 mm bophara). Ka hona, ho ka etsahala hore tlala e khone ho etsa hore palo ea opioid e qetelle e le nucleus accumbens hotspot ho matlafatsa 'ho rata' le ho 'batla' bakeng sa lijo tse monate.

Mekhoa ea endocannabinoid ea allyesthesia?

Mokhoa o mong oa bokhoni ba ho etsa hore lijo li latsoehe hamolemo nakong ea tlala ke ho hiroa ha motho ka nako e le 'ngoe sebakeng se tšoanang sa hexic of shell shell. Bopaki bo bontša hore li-endocannabinoids li ka ngolisoa ka tlala le tlala. Ka mohlala, Kirkham le basebetsi-'moho le eena ba ile ba tlaleha hore 24-hr ka potlako ho likhoto e phahamisa maemo a endocannabinoids, anandamide le 2-arachidonoyl, glycerol ka mehaho ea li-forebrain li-structures tse akarelletsang nucleus accumbens (). Ka lebaka la ho ba le tlala ea ho qetela ha ho e-ba teng nakong ea tlala ho ka ntlafatsa hedonic 'ho rata' lijo (; ). Sena se ka 'na sa etsa hore' se rate 'haholo-holo haeba lipontšo tsa endocannabinoid tse nang le bokhoni li fihlella hotspoteng e le' ngoe ho khetla ea nucleus accumbens, moo anandamide microinjections e tsejoang ho ntlafatsa 'ho rata' ho monate (). Hape hoa hlokomeleha hore li-endocannabinoids li boetse li thusa ho etsa mesolombic dopamine ka sebaka sa ventral tegmental le libaka tse ling, e leng ho ka fokolisang 'ho hloka' lijo tse khotsofatsang ho itšetlehile ka hedonic 'liking' (; ).

Mekhoa ea Orexin ea allyesthesia?

Sehlopha se seng sa menyetla e kenyelletsa orexin hape, empa e sebetsana ka tsela e tobileng ho feta ka sekhahla sa thalamic sa mohokahanyi ho etsa hore ho be le methapo ea hotspot (). Li-neurone tse hlahisang orexin tse sebetsang ka ho fetisisa li fumanoa ka lateral hypothalamus, moo li 'nileng tsa hlalosoa hore li sebelise moputso bakeng sa lijo, lithethefatsi, thobalano, joalo-joalo (; ; ; ) [li-orexin tse eketsehileng kapa li-neurons tsa hypocretin li fumanoa hape linthong tse ling tsa hypothalamic, tseo ho e-na le hoo li ka buisana ka ho tsoha le ho falimeha (; )].

Ma-orexin neurons a amanang le moputso oa lateral hypothalamus a sebelisoa ka ho hlahisa lipontšo tsa neuropeptide-Y (NPY) nakong ea tlala (; ). Mokhoa o mong oa orexin neurons bakeng sa ventral pallidum le nucleus accumbens (; ; ; ; ). Joalokaha ho hlalositsoe ka holimo, re sa tsoa fumana hore orexin microinjections ka ventral pallidum hotspot e ka 'na ea e-ba le tšusumetso e tobileng ea' ho rata 'ho monate (). Ka ho khetheha, ka nako eo, ho sebetsa ha orexin nakong ea tlala ho ka ntlafatsa ka ho toba hedonic tšusumetso ka ho susumetsa li-neurons holong ea hedonic, e kang posterior ventral pallidum. Ka hona orexin e ka sebetsa ka mokhoa o atlehileng ho hokae ha hedonic e tšoanang le ka lipontšo tsa opioid tse entsoeng ventral pallidum (le ho nahanoa ka nucleus accumbens). Ho phaella moo, orexin e ka 'na ea etsa hore' ho batle 'ka bobeli ka li-hotspots tsena tse ka pele le ka likhahlelo tsa mesolambic dopamine neurons ka ventral tegmentum.

Mekhoa ea Leptin ea allyeshesia?

Ka lehlakoreng le leng, satiety e bolela ho hatella 'ho rata' le ho 'batla' lijo esita leha ho le thata ho tima ka ho feletseng moputso oa lijo (; ; ; ; ; ). Tsela e 'ngoe ea ho etsa li-alliesthesia tse mpe nakong ea lefu la satiety ke leptin, e tsejoang ka lisele tse mafura' meleng. Leptin e sebetsa ka li-neuron ka nucleus e khutsitseng, e meng ea hypothalamic nuclei le ho brainstation, ho akarelletsa le ventral tegmentum moo e ka fetolang mesolimbic dopamine lipotoloho le 'ho batla' lijo; ; ; ; ; ; ; ). Leptin e ka 'na ea boela ea kenya letsoho mofuteng oa alliesthesia-o susumelletsehang ho "khaotsa" ho hatella ka ho susumetsa li-POMC / CART neurons tsa hypothalamic arcuate ho etsa hore batho ba amohele MCR4 li-neurone, kapa ka ho thibela methapo ea NPY-AGrP e thibelang ho tlosa orexin neurons ka lateral hypothalamus, kahoo e fokotsa opioid kapa orexin tsusumetso ea li-hotspots tsa hedonic ka ventral pallidum kapa nucleus accumbens.

Har'a batho, Farooqi le O Rahilly le basebetsi-'moho le bona ba tlalehile liphello tse thahasellisang tse bontšang ho se sebetse ha matla a leptin ho thibela 'ho batla' kapa ho "rata" ka mokhoa o itseng oa boima bo bongata ba liphatsa tsa lefutso: batho ba tsoetsoeng ke leptin, bao ka linako tsohle ba nang le bana batla lijo mme ka potlako e ba mafura (; ). Ha ho se na leptin batho bana ba feteletse litekanyetso tse ratehang bakeng sa lijo tse amanang ka ho toba le nucleus accumbens activation ka ts'ebetso ea lijo e lekantsoeng ke fMRI. Ho fapana le batho ba bangata, ba ts'oanela ho sebetsa ha ba thibeloe ke ho ja lijo tse phetseng hantle, ho fana ka maikutlo a ho phehella ho sa tloaelehang ha 'ho rata' le ho 'batla' ho ts'oaroa esita le nakong ea ho satiety. Farooqi le basebetsi-'moho le eena ba tlaleha hore ho fa batho bana meriana e mengata ea leptin ho lumella li-caloric satiety hore li boele li khone ho thibela ho thibela likokoana-hloko ka lijo, e le hore litlhaloso tse bapang li tsamaisane le nucleus accumbens activation feela ha li lapile, 'me ha li sa ja ka mor'a lijo . Liphuputso tse joalo li bonahala li lumellana le khopolo ea hore leptin (ho sebelisana le litlaleho tse ling tsa tlala / satiety) e beha bokhoni ba lipontšo tsa satiety tsa lijo ho thibela 'ho rata' le ho 'batla' lijo ().

Likokoanyana, tsamaiso ea leptin sebakeng sa ventral tegmental e ka hlahisa ho fokotsa litekanyetso tsa ho thunngoa bakeng sa mesolimbic dopamine neurons, e lumellanang le ho fokotseha ha 'ho batla', 'me ka boitšoaro ho thibela ho ja lijo tse monate (). Leptin le insulin li boetse li bontšitsoe sebakeng sa ventral tegmental ho thibela tšusumetso ea mokhoa oa ho ja le ho ja lijo tse ling tse sa hlahisoang ke ho tsosoa ha opioid ea mohaho o tšoanang o hlahisoang ke DAMGO microinjection (; ). Liketso tse kang lik'hemik'hale tsa insulin sebakeng sa ventral tegmental li bonahala li akarelletsa ho phahama ha motlakase oa dopamine (DAT) ka dopamine neurons le ho fokotseha ho itseng ha synaptic extracellular dopamine maemong a nucleus accumbens (; ; ). Leha ho le joalo, hoa lokela ho hlokomeloa hore tse seng kae tse hlephileng li ntse li le teng bakeng sa khopolo ea hore leptin e hatella lijo tse 'batlang' le 'ho rata'. Ka ho makatsang, ka mohlala, hoo e ka bang phello e fapaneng e 'nile ea tlalehoa ka litoeba tse nang le leptin tse fokolang (ob / ob), ka leptin eo ho ile ha bonahala ho hlasimolla likokoana-hloko tse fokolang tsa accumbens dopamine (; ). Karolo ena ea puzzle e ntse e tla hlalosoa.

Ho imeloa kelellong e le ho khothalletsa ho ja le ho ja

Khatello ea kelello e khothalletsa ho ja lijo tse monate tse ka bang 30% ea baahi (; ). Mekhoa e 'maloa ea kelello le ea methapo ea pelo e ka hlalosa khatello ea kelello e bakoang ke khatello ea kelello. Litlhaloso tsa setso tsa khatello ea kelello e bakoang ke khatello ea kelello e atisa ho lebisa tlhokomelo ho likarolo tse fokolang tsa khatello ea maikutlo, le liphello tse thobang tsa hedonic tsa ho ja lijo tse monate. Ke hore, ho eketseha ha ho ja nakong ea khatello ea maikutlo ho tloaelehile hore e be teko ea ho fokotsa khatello ea kelello ka ho itlhoekisa ha hedonic (; ; ).

Ka ho tšoanang, ho lokolloa ha motsoako oa corticotropin-release (CRF), mokhoa oa boko ba khatello ea kelello, o fetiselitsoe ho hlahisa naha e tsitsitseng e tlatsetsang lijo ka tsela e sa tobang, ka ho khothalletsa ho ja lijo tse monate haholo (ho khothatsa lijo) e le ho fokotsa boemo bo fokolang ( hedonic kalafo ea meriana) (; ; ). Ho tšehetsa meriana ea hedonic ea meriana, ho sebelisoa ha lijo tse monate tsa matšeliso ho ka fokotsa HPA boikarabello le maemo a tlase a basallo a CRF hypothalamus ka mor'a khatello ea maikutlo, athe khatello ea kelello e eketsa ho lokolloa ha CRF (; ; ). Ho thibela li-receptors tsa CRF ho ka eketsa ho ja lijo tse seng monate ha li ntse li thibela ho ja serose ().

Leha ho le joalo, ho lokolloa ha CRF ho boetse ho nyoloha ka ho toba karolong ea bohareng ea amygdala ka ho ja lijo tse monate (), le li-CRF tse nang le lisebelisoa tse ngata tsa tlhahlobo ea li-CRF kapa hyperhalamus tse atolositsoeng li atisa ho thibela boitšoaro bo sa tsitsang le ho ja lijo,; ). Seo se bonahala se le tšenyo bakeng sa khopolo ea hore mebuso e ts'oanang e hlokahalang bakeng sa CRF, kapa hore CRF e ts'ehetsa ho kenngoa ka mekhoa ea boko bo sebetsanang le liphello tsa eona.

Tlhaloso e ka 'na ea e-ba hore litsing tse ling tsa boko CRF le khatello ea kelello li ka' na tsa susumetsa ka ho toba ho 'batla' ho ja, ntle le hore ho baka maemo a tsitsitseng kapa ho hloka meriana ea hedonic ho matlafatsa ho ja. Ka mohlala, le laborateng ea rona Susana Peciña o fumane hore CRF microinjection nucleus accumbens shell e ts'ehetsa ka ho toba hore ho na le 'ho batla' bakeng sa sucrose, tlasa maemo a neng a etsa hore ho be le mokhoa o tsitsitseng oa ho susumetsa kapa ho hlalosa litlhare tsa hedonic. Ho e-na le hoo, CRF microinjections ka khetla e kopanetsoeng ea nucleus accumbens e ile ea phahamisa ka ho hlaka kabelo ea ho ba le boikutlo ba ho susumetsa maikutlo ho tse ling tse nang le tsoekere.

Li-CRF li matlafalitsoe ka matla ho fumana litlhapi tsa tsoekere tse bakoang ke ho kopana le tsoekere ea tsoekere, tekong ea Pavlovian-Instrumental Transfer e etselitsoeng ho qoba litlhaloso tse ling ntle le ts'ehetso e matla (). Microinjection ea CRF e ne e le matla joaloka amphetamine microinjection nucleus accumbens (e neng e tla etsa hore ho be le tokoloho ea dopamine) ho ntlafatsa litlhōrō tsa 'ho batla'. Feela joalokaha dopamine e ne e etsa, CRF ka nucleus accumbens e ile ea eketsa matla a susumetsang a ts'ebetso ea tsoekere ho qosa tlhōrō ea tlhōlo ea takatso, ho e-na le ho sebetsa e le mohato o sa khaotseng kapa o tsitsitseng. Ka mantsoe a mang, ho phahamisoa ha 'ho batla' ho hlahisitsoe ke CRF ho ile ha tla le ho bonahala le ho nyamela ha motho a ntse a e-na le 'mele, le hoja CRF e ntse e le bokoeng ho pholletsa le nako eohle. Tšebelisano ena ea 'ho batla', e hlokang khokahano e kopanetsoeng hammoho le CRF, e lumellana le mohlala oa khothatso oa khothatso ea Setšoantšo sa 1, 'me e fana ka maikutlo a hore CRF ha ea ka ea hlahisa koloi e tsitsitseng ea ho fumana sucrose, empa ho e-na le hoo e eketsa khahleho ea lijo tsa lijo.

Tšusumetso ena e susumetsang ea CRF nucleus accumbens e ka fana ka tlhaloso ea libaeletso tsa hore na ke hobane'ng ha khatello ea kelello e ka ntlafatsa ho qeta ho ja lijo tse holimo. Tlhaloso ke hore CRF ka nucleus accumbens e etsa hore ho bona, ho fofonela, molumo, kapa ho nahana ka lijo ho 'batla' 'me ho khone ho etsa hore' ho hloka 'ho matla ho ja lijo tse amanang. Mohlomong, CRF karolong e bohareng ea amygdala le amygdala e atolositsoeng e ka 'na ea e-ba le tsusumetso e tšoanang le eona (). Sepheo sa bohlokoa ka ho fetisisa sepetlele sa liphuputso tsena ke hore khatello ea kelello-e kenyelletsoeng ke CRF e ka ntlafatsa khopolo ea 'ho batla' ho ja esita le haeba boemo ba khatello ea kelello bo sa lemohehe. Esita le khatello ea kelello e thabisang, e kang ho hapa lotho kapa ho ts'ehetsa, e ka etsa hore mokhoa ona oa KRF o susumelletsang batho. Hona ho ka boela ha amana le hore na ke hobane'ng ha tsamaiso ea glucocorticoid e ka eketsa lijo tsa boithaopo ka boithatelo (), le hoja litoeba li tla sebetsa ho fumana likokoana-hloko tsa glucocorticoid (intravenous glucocorticoid infusions)). Le hoja khatello ea kelello le ts'usumetso e ka 'na eaba moetlo o nkoa e le likhohlano tsa kelello, mekhoa ea boko e ka sebelisanang le eona e ka' na ea e-ba teng ka mokhoa o makatsang (; ; ; ). Hedonic ho iphekola ha lichelete ho ka 'na ha se ke ha hlokahala kamehla hore khatello ea kelello e etse hore batho ba je haholo. Ka bokhutšoanyane, ha ho hlokahale kamehla hore khatello ea kelello ahlaahlengikemela ho ts'oanela ho ts'ehetsa ho feta.

Ho lemalla lijo?

Le hoja ho ntse ho e-na le likhang, khopolo ea ho lemalla lijo e ntse e nkoa e le e nepahetseng, bonyane bakeng sa maemo a mang a ho qobella ho ja lijo tse ngata (; ; ; ; ; ; ; ; ; ). Ho ja lijo tse ngata ho bolela eng ho fapana ho ea ka hore na ke mang ea li hlalosang. Litlhaloso tse ling li tsepamisa mohopolo o monate oa letsoai, o letsoai kapa o mafura o ts'oanang le oa ho ntlafatsa mokhoa oa theknoloji ea lijo tse ntseng li sebelisoa mehleng ea kajeno, e leng se etsang hore e be tšusumetso e matla-kholo e nang le matla a susumetsang lithethefatsi (; ; ; ; ; ). Lijo tsa morao-rao le litlhoko tsa tsona li ka 'na tsa etsa hore boko bo' rate 'le' ho batla 'mekhoa e matla, haholo-holo ho batho ba bang (; ; ; ).

Maikutlo a mang a ne a tla thibela lengolo la ho lemalla lijo ho batho ba seng bakae feela, haholo-holo litabeng tsa ho ja haholo-holo moeling oo haufi le ho qobelloa (; ; ; ). Ka mohlala, Davis le Carter ba bolela hore ke batho ba itseng feela ba tšoanelehang bao ka bobeli ba leng bobebe 'me ba na le bothata bo matla ba ho ja, ba nang le litšobotsi tse kang ho lahleheloa ke taolo le ho khutlela morao. Batho ba joalo ba atisa ho itlhalosa hore ke "batho ba jang ka thata" kapa "ba lemalloang lijo" (; ). Ha a hlalosa phalliso e ka 'nang ea e-ba teng, Davis le basebetsi-'moho le eena ba sa tsoa fumana hore batho ba joalo ba ne ba le monyetla o moholo oa hore ba nke G + eohle bakeng sa liphatsa tsa lefutso tse amohelang "phaello ea mosebetsi" bakeng sa matšoao a opioid,' me ka nako e tšoanang ba nke A2 allele e amanang ka letšoao la Taq1A le ka eketsang ho tlama ho dopamine D2 receptor (). Davis le basebetsi-'moho le eena ba fana ka maikutlo a hore motsoako ona oa liphatsa tsa lefutso o ka eketsa matšoao a li-opioid le lipontšo tsa dopamine ka tsela e tšoanang, 'me ka tsela e joalo a phahamisa' ho rata 'le ho' batla 'lijo ka poho e le' ngoe e khothalletsang ho ja lijo tse ngata le botenya. Ka tsela e tšoanang, Campbell le Eisenberg ba fane ka tlhahiso ea hore batho ba nang le liphatsa tsa lefutso tse khothalletsang ho sebelisoa ha dopamine e phahameng ba ka 'na ba hlaheloa ke matšeliso a matla a ho susumelletseha ka ho ba teng ha lijo le ho ba le boikarabelo bo eketsehileng ba ho ntlafatsa botenya ().

Litlhahiso tse joalo li bonahala li lumellana haholo le seo re se tsebang ka mekhoa ea boko ea tšusumetso e matla le ea tšusumetso ea hedonic. Ka ho feteletseng, 'me ha li tsepamisitse maikutlo ho susumelletseha ho ba le tšusumetso, litlhahiso tse joalo li ka ba tsa hlahisa lijo tse ts'oanang le ts'ebeliso ea bokooa e hlalosang hore na ke hobane'ng ha lithethefatsi tse ling li ka' na tsa 'batla' ho sebelisa lithethefatsi le ha li sa ' joaloka 'bona (; ; ). Mekhoa e tsitsitseng ea ho 'batla' ho ja e ka 'na ea hlahisoa ka mokhoa oa tlhahiso-kholiso ea phetisetsong ea bokhoni boemong bo botle ba lipotoloho tsa mahlo a khothatso. Maikutlo ana a lumellana le litlhahiso tse fokolang-tse kang liphetoho tsebong bokong ba mahlo a maholo a hlahisoang ke ho hlahisa lijo le ho phallela likhahla (; ; ; ; ; ; ; ). Ha ho pelaelo hore liphetoho tse entsoeng ka liphatsa tsa lefutso tse hlalositsoeng ka holimo ho motho ea nang le opioid, dopamine kapa leptin e hlalositsoeng ka holimo e ka 'na eaba li fetotse lipotoloho tsa boko ba boko bo sebetsang ho lijo ka tsela e ts'oanang le ea hore na li nkiloe ke lithethefatsi. Motho ea joalo a ka ba le boikarabello ba litlhōrō tse matla tsa 'ho batla' bakeng sa lijo ka maemo a feteletseng ao batho ba bang ba ke keng ba ba le bophelo bo tloaelehileng, 'me ba sitoa ho ba le ntle le haeba ba lapile haholo. Ho qobelloa ho ja ho joalo ho ka 'na ha tšoanela ho bitsoa ho lemalla lijo.

Ka kakaretso, phehisano mabapi le hore na ho ja lijo tse ngata ka ho tloaelehileng ho lokela ho bitsoa ho lemala ho ka 'na ha tsoelapele ka nako e kae. Ebang 'ho batla' lijo ho ka finyella maemo a phahameng a lekaneng ao ho nahanoang hore a tšoana le ho lemalla lithethefatsi, 'me ho mang, ke lipotso tse bulehileng. Leha ho le joalo, esita le bohle ba tloaetseng ho sebelisa lithethefatsi ke 'ho lemalla' ka kutloisiso-ho khothatsa, 'me batho ba fetang-ho ja ba tla fapana le litseleng tsa kelello hape. Ho ka 'na ha e-ba molemo hore u lule u hopotse hore ho' batla 'le' ho rata 'ho fapana ka mokhoa o hlophisitsoeng ho latela li-continuum, ho e-na le hore e be' lemalla kapa che '. Ho tla ba le mebala e mengata ea bohlooho.

fihlela qeto e

Mesebetsi ea 'ho rata' le ho 'batla' ka botenya e qalile ho utloisisoa. Re qetella ka ho khutlela molaong oa menyetla e utloahalang e hlalositsoeng qalong.

Ntlha ea pele, ho ka etsahala hore ho phahama ho sa rateheng ho 'rata' kapa ho 'batla' lits'ebeletso ho baka bonyane maemong a ho ja haholo. Ha e le hantle, hedonic 'ho rata' e ka 'na ea fetoloa ho batho ba bang, joaloka mohlomong maemong a mang a lefu la ho itlopa joala joalokaha ho boletsoe ka holimo. Ka tsela e 'ngoe, ho ka' na ha e-ba le phetoho e fapaneng ea 'ho batla' ho batho ba bang, e batlang e tšoana le ts'oaetso e amanang le lithethefatsi ea ts'ehetso-ts'ehetso. Lijo tse 'ratang' le 'ho batla' li ka arohanya ka mokhoa o itseng esita le maemong a tloaelehileng, joalo ka ha ho 'batla' ho fokotseha ka potlako kapa ho feta ho 'rata' lijo tse tšoanang le ha satiation e ntse e tsoela pele. Mathata a ho ja a ka 'na a feteletsa ho arohana hona,' me a lebisa litsing tseo 'ho batla' ho phahameng ka ho fetisisa (kapa ho tlase haholo) ho amanang le 'ho rata' ho ntseng ho tloaelehile. Ho eketseha ha bohale ba ts'ehetso ea lijo kapa li-parameters tse amanang le dopamine tsa mosebetsi oa boko bo tšohloang ka holimo li bonahala li lumellana le monyetla ona.

Ea bobeli, mekhoa ea ho 'batla' kapa ea 'ho rata' e ka fetola botenya kapa ho kula, empa e le letšoao kapa liphello tsa boemo ba bona ho e-na le hore e be sesosa. Ka mohlala, ho bonahala eka ho na le maikutlo a hore bonyane liphetoho tse ling tsa dopamine D2 receptor tse tlamang batho ba feteletseng e ka ba sephetho ho fapana le sesosa sa ho ja ho feta. Qetellong, 'ho rata' le ho 'batla' ho ka 'na ha sebetsa hangata maemong a mang, e le hore mohloli oa bothata le tharollo oa oona o hlokehe sebakeng se seng.

Tloaelo e ntseng e hōla ea boima ba 'mele e eketseha e bakoa ke ho fumaneha ha lijo tse ngata tse amanang le tsamaiso ea boko ba boko e ileng ea iphetola libakeng tse fokolang. Mekhoa ea ho iphetola ha lintho, mekhoa ea bokooa ea ts'usumetso le ts'ebetso e neng e e-na le 'ho ea' ka ho 'emisa' e nyenyane e ka lula e fetoha, empa hona joale likarolo tse ling tsa mekhoa ea bokooa li ka sebetsa khahlanong le lithahasello tsa batho. Kutloisiso e molemo ea 'ho batla' le ho 'rata' mekhoa e lumellanang le mefuta e fapaneng ea mathata a ho ja le botenya ho ka lebisa mererong e ntlafatsang ea phekolo, mme mohlomong ho thusa batho ba batlang ho atleha ho etsa lipontšo tsa 'stop' tsa bona.

lumela hore baa fokola

Leqephe lena le neheloa mohopolong oa Ann E. Kelley (moeta-pele oa "neuroscience of food reward") le oa Steven J. Cooper (moeta-pele oa psychopharmacology ea moputso oa lijo). Mosebetsi oa bo-rasaense bao ba ikhethang o ile oa beha sethaleng bakeng sa litaba tse ngata tse sebetsanoang mona, 'me mafu a bona a morao tjena e ne e le tahlehelo e bohloko ea tšimo. Re leboha Ryan Selleck bakeng sa ho nchafatsa Litšoantšo 1, , 2,2, 'me Le3.3. Liphetho tse hlalositsoeng mona li tsoa mosebetsing o tšehetsoang ke litšehetso tsa DA015188 le MH63649 tse tsoang ho NIH.

Mongolo o botlaaseng ba leqephe

 

Boitlhotlhollo ba Mohoeletsi: Ena ke faele ea PDF ea mongolo o ngotsoeng ka letsoho o sa amoheloang o amoheletsoeng bakeng sa ho hatisoa. Joaloka tšebeletso ho bareki ba rona re fana ka phetolelo ena ea pele ea mongolo o ngotsoeng ka letsoho. Mongolo o ngotsoeng ka letsoho o tla ba le ho kopitsa, ho kenya lihlopha le ho hlahloba bopaki bo hlahang pele o hatisoa ka mokhoa oa oona oa ho qetela. Ka kopo hlokomela hore nakong ea mekhoa ea tlhahiso ea lihlahisoa e ka fumanoa e ka amang litaba, le litsebiso tsohle tsa molao tse sebetsang koranteng e amanang le eona.

 

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