Dopamine ndi neurotransmitter yochititsa chidwi yomwe imatenga gawo lofunikira pamalipiro aubongo ndi malo osangalatsa. Nthawi zambiri amatchedwa mankhwala "omva bwino", amayang'anira machitidwe osiyanasiyana amthupi ndi m'malingaliro omwe amakhudza momwe timamvera, zolimbikitsa, komanso zizolowezi zathu.
Dopamine, yomwe nthawi zambiri imatchedwa "kumva bwino" neurotransmitter, idapezeka koyamba m'ma 1950 ndi wasayansi waku Sweden Arvid Carlsson. Amatchulidwa ngati monoamine neurotransmitter, zomwe zikutanthauza kuti ndi messenger wamankhwala omwe amanyamula zizindikiro pakati pa maselo a mitsempha. Dopamine imapangidwa m'madera angapo a ubongo, kuphatikizapo substantia nigra, ventral tegmental area, ndi hypothalamus ya ubongo.
Ntchito yayikulu ya dopamine ndikutumiza ma siginecha pakati pa ma neuron ndikuwongolera magwiridwe antchito osiyanasiyana amthupi. Imaganiziridwa kuti imayang'anira kayendetsedwe kake, kuyankha kwamalingaliro, zolimbikitsa, komanso kumva chisangalalo ndi mphotho. Dopamine imakhalanso ndi gawo lofunikira munjira zosiyanasiyana zamaganizidwe monga kuphunzira, kukumbukira, ndi chidwi.
Pamene dopamine imatulutsidwa munjira za mphotho za ubongo, imatulutsa chisangalalo kapena kukhutitsidwa.
Munthawi yachisangalalo ndi mphotho, timatulutsa kuchuluka kwa dopamine, ndipo milingo ikatsika kwambiri, timakhala osalimbikitsidwa komanso opanda thandizo.
Kuphatikiza apo, dongosolo la mphotho la ubongo limalumikizidwa kwambiri ndi dopamine. Udindo wa ma neurotransmitters ndikulimbikitsa kumverera kosangalatsa ndi kulimbikitsana, potero kumabweretsa chilimbikitso. Kutikakamiza kuti tikwaniritse zolinga zathu ndikufunafuna mphotho.
Dopamine imapangidwa m'madera angapo a ubongo, kuphatikizapo substantia nigra ndi ventral tegmental area. Maderawa amakhala ngati mafakitale a dopamine, kupanga ndi kutulutsa neurotransmitter iyi m'malo osiyanasiyana a ubongo. Akatulutsidwa, dopamine imamangiriza ku zolandilira zina (zotchedwa dopamine receptors) zomwe zili pamwamba pa selo yolandira.
Pali mitundu isanu ya ma dopamine receptors, otchedwa D1 mpaka D5. Mtundu uliwonse wa receptor umakhala m'dera losiyana laubongo, kulola dopamine kukhala ndi zotsatira zosiyanasiyana. Pamene dopamine imamangiriza ku cholandirira, imakondweretsa kapena kulepheretsa ntchito ya selo yolandira, kutengera mtundu wa cholandirira chomwe chimamangiriridwa.
Dopamine imatenga gawo lofunikira pakuwongolera kayendetsedwe ka njira ya nigrostriatal. Mwanjira iyi, dopamine imathandizira kuwongolera ndikugwirizanitsa ntchito za minofu.
Mu prefrontal cortex, dopamine imathandizira kuwongolera kukumbukira ntchito, kutilola kuti tigwire ndikuwongolera zidziwitso m'malingaliro athu. Zimagwiranso ntchito pa chidwi ndi kupanga zisankho. Kusalinganika kwa ma dopamine mu prefrontal cortex kwalumikizidwa ndi zinthu monga chidwi cha deficit hyperactivity disorder (ADHD) ndi schizophrenia.
Kutulutsidwa ndi kuwongolera kwa dopamine kumayendetsedwa mwamphamvu ndi ubongo kuti ukhalebe bwino ndikuwonetsetsa kugwira ntchito bwino. Dongosolo lovuta la machitidwe oyankha, ophatikiza ma neurotransmitters ena ndi zigawo zaubongo, amawongolera milingo ya dopamine.
Dopamine ndi messenger yamankhwala, kapena neurotransmitter, muubongo yomwe imanyamula zizindikiro pakati pa ma cell a mitsempha. Zimagwira ntchito yofunika kwambiri m'ntchito zosiyanasiyana za ubongo, kuphatikizapo kuyendetsa kayendetsedwe ka kayendetsedwe kake, kamvekedwe ka maganizo, ndi kuyankha kwamaganizo, zomwe zimapangitsa kuti zikhale zofunika kwambiri m'maganizo athu. Komabe, kusalinganika kwa milingo ya dopamine kumatha kubweretsa zovuta zosiyanasiyana zamaganizidwe.
●Kafukufuku akuwonetsa kuti anthu omwe ali ndi vuto la kukhumudwa amatha kukhala ndi milingo yotsika ya dopamine m'malo ena aubongo, zomwe zimapangitsa kuchepetsa chidwi komanso kusangalala ndi zochitika za tsiku ndi tsiku.
●Kusalinganika kwa dopamine kungayambitse kusokonezeka kwa nkhawa. Kuchulukitsa kwa dopamine m'malo ena aubongo kumatha kuyambitsa nkhawa komanso kusakhazikika.
●Zochita zochulukirapo za dopamine m'magawo ena aubongo zimaganiziridwa kuti zimathandizira kuzizindikiro za schizophrenia, monga kuyerekezera zinthu m'maganizo ndi chinyengo.
●Mankhwala osokoneza bongo komanso zizolowezi zoyipa nthawi zambiri zimachulukitsa milingo ya dopamine muubongo, zomwe zimapangitsa kuti anthu azikhala osangalala komanso opindulitsa. Pakapita nthawi, ubongo umadalira zinthu izi kapena machitidwe kuti amasule dopamine, ndikupanga chizoloŵezi choledzeretsa.
Q: Kodi mankhwala angagwiritsidwe ntchito kuwongolera milingo ya dopamine?
A: Inde, mankhwala ena, monga dopamine agonists kapena dopamine reuptake inhibitors, amagwiritsidwa ntchito pochiza matenda okhudzana ndi dopamine dysregulation. Mankhwalawa angathandize kubwezeretsa mphamvu ya dopamine mu ubongo ndikuchepetsa zizindikiro zokhudzana ndi matenda monga Parkinson's disease kapena depression.
Q: Kodi munthu angakhale bwanji ndi thanzi labwino la dopamine?
A: Kukhalabe ndi moyo wathanzi, kuphatikizapo kuchita masewera olimbitsa thupi nthawi zonse, kudya zakudya zopatsa thanzi, kugona mokwanira, komanso kuthetsa nkhawa, kungathandize kuti dopamine ikhale yabwino. Kuchita zinthu zosangalatsa, kukhazikitsa zolinga zomwe zingatheke, komanso kuchita zinthu mwanzeru kungathandizenso kukhala ndi thanzi labwino la dopamine.
Chodzikanira: Nkhaniyi ndi yongofuna kudziwa zambiri ndipo siyenera kutengedwa ngati upangiri wachipatala. Nthawi zonse funsani akatswiri azachipatala musanagwiritse ntchito zowonjezera kapena kusintha dongosolo lanu lazaumoyo.
Nthawi yotumiza: Sep-15-2023