Ubongo wa otchova njuga umakhudzidwa kwambiri ndi "zoperewera pang'ono" kuposa otchova juga wamba, zomwe zimawapangitsa kuti azisewera kwambiri, malinga ndi kafukufuku watsopano mu Meyi 5 The Journal of Neuroscience. Ofufuzawo adapeza dera laubongo lomwe limayankha mphotho pobweretsa mankhwala a dopamine omwe anali achilengedwe anali othandiza kwambiri mwa anthu awa.
Kafukufuku akuwonetsa kuti kutchova juga kwamatenda osokoneza bongo ndichizolowezi, chimodzimodzi m'njira zambiri zosokoneza bongo. Tsopano, ofufuza aku UK a Luke Clark, PhD, aku University of Cambridge, ndi a Henry Chase, PhD, aku University of Nottingham apeza kuti momwe ubongo wamunthu umayankhira pazophonya zapafupi zitha kuwonetsa kuledzera. M'chaka chimodzi, akulu akulu aku US opitilira mamiliyoni awiri amadzimva kuti akufuna kutchova juga ngakhale atakumana ndi zovuta.
Pakafukufukuyu, ofufuza adagwiritsa ntchito maginito opanga maginito (fMRI) kuti aone ubongo wa otchova njuga 20. Zizoloŵezi za otchova juga za omwe adatenga nawo mbali kuyambira pakugula tikiti ya lottery kwakanthawi kochepa mpaka kubetcha mwamasewera.
Poyeserera, odzipereka adagwiritsa ntchito makina owonekera pakompyuta okhala ndi mawilo awiri ozungulira azithunzi. Zithunzi ziwirizo zikafanana, wodzipereka adapambana pafupifupi masenti 75, ndipo mphotho yaubongo idayamba kugwira ntchito. Chizindikiro chosafanana chinali kutayika. Komabe, mawilo akaima mkati mwa chithunzi chimodzi cha masewera, zotsatira zake zimawonedwa ngati kuphonya pafupi. Clark ndi gulu lake adapeza kuti zomwe zaphonya zimayambitsa njira zomwezo zomwe zimapambana, ngakhale sanalandire mphotho.
"Zomwe apezazi ndizosangalatsa chifukwa akuwonetsa kuti zotsatira zaposachedwa zimatha kuyambitsa kuyankha kwa dopamine mwa otchova juga ovuta kwambiri, ngakhale kulibe mphotho yeniyeni yomwe imaperekedwa," adatero Clark. "Ngati kuphulika kwa dopamine uku kumayambitsa zizolowezi zosokoneza, izi zitha kuthandiza kufotokoza chifukwa chomwe otchova juga amavutikira kusiya."
Makamaka, olemba adawona kuyankha mwamphamvu mu midbrain, malo omwe amaphatikizidwa ndi chizolowezi chomwe chili ndi maselo a ubongo opatsa dopamine. Adapezanso kuti zophonya zapafupi zidalumikizidwa ndi zochitika zowonjezereka mu zigawo zaubongo zomwe zimatchedwa kuti ventral striatum ndi nyumba yogona kunja, madera omwe ali ndi mphotho ndi kuphunzira.
Kafukufuku wasonyeza kuti anthu omwe amasewera masewera mwamwayi, monga makina olowetsa zinthu kapena lottery, nthawi zambiri amakhulupirira molakwika kuti mulingo wofunikira muyenera kupambana. Kuwongolera kopusitsaku nthawi zambiri kumakankhira osewera kuti apitirize. A Matthew Roesch, PhD, katswiri pa mphotho ndi machitidwe ku Yunivesite ya Maryland College Park yemwe sanalumikizidwe ndi phunziroli, akuti kuchuluka kwambiri kwa dopamine panthawi yakusowa kungakhale kofunikira pakuyendetsa njuga zam'mbuyo ndikuthandizira malingaliro olakwika akuti masewera omwe amapanga mwamwayi amakhudzanso luso lililonse.
"Ntchito zamtsogolo zidzafunika kudziwa ngati kuyankha kumeneku kuli koyambitsa kapena ngati izi sizachilendo kwa omwe ali ndi vuto lotchova njuga - komanso ngati sizachilendo kuzolowera," adatero Roesch.
Kafukufukuyu adathandizidwa ndi a Responsible in Gossip Trust (omwe tsopano ndi a Responsible Gging Fund), Medical Research Council (United Kingdom), komanso Wellcome Trust, ndipo adamaliza mu University of Cambridge Behavioral and Clinical Neuroscience Institute.
Mutu wa Nkhani:
Zipangizo zoperekedwa ndi Society for Neuroscience. Zindikirani: Zokwanira zingasinthidwe ndi kalembedwe ndi kutalika.
Journal Ndemanga:
- Henry W. Chase, a Luke Clark. Kutchova Njuga Kumatsimikizira Kuyankha Kwa Midbrain Ku Zotsatira Zapafupi Zosowa. Journal of Neuroscience, 2010; 30 (18): 6180 DOI: 10.1523 / JNEUROSCI.5758-09.2010