Dopamine ndi neurotransmitter yosangalatsa yomwe imagwira ntchito yofunika kwambiri m'malo opatsa mphoto ndi zosangalatsa muubongo. Nthawi zambiri imatchedwa mankhwala "omwe amamva bwino", imayambitsa njira zosiyanasiyana za thupi ndi zamaganizo zomwe zimakhudza momwe timamvera, chilimbikitso, komanso machitidwe oledzera.
Dopamine, yomwe nthawi zambiri imatchedwa neurotransmitter ya "kumvera bwino", idapezeka koyamba m'ma 1950 ndi wasayansi waku Sweden Arvid Carlsson. Imagawidwa ngati neurotransmitter ya monoamine, zomwe zikutanthauza kuti ndi mthenga wa mankhwala womwe umanyamula zizindikiro pakati pa maselo amitsempha. Dopamine imapangidwa m'malo angapo a ubongo, kuphatikiza substantia nigra, ventral tegmental area, ndi hypothalamus ya ubongo.
Ntchito yaikulu ya dopamine ndikutumiza zizindikiro pakati pa ma neuron ndikukhudza ntchito zosiyanasiyana za thupi. Amakhulupirira kuti imawongolera mayendedwe, mayankho amalingaliro, chilimbikitso, ndi malingaliro a chisangalalo ndi mphotho. Dopamine imagwiranso ntchito yofunika kwambiri m'njira zosiyanasiyana zamaganizo monga kuphunzira, kukumbukira, ndi kusamala.
Pamene dopamine itulutsidwa m'njira zopindulitsa muubongo, imabweretsa chisangalalo kapena kukhutitsidwa.
Munthawi yosangalala komanso yopatsa mphotho, timatulutsa dopamine yambiri, ndipo pamene milingo yake ndi yotsika kwambiri, timamva kuti tilibe mphamvu komanso opanda thandizo.
Kuphatikiza apo, dongosolo la mphotho muubongo limagwirizana kwambiri ndi dopamine. Ntchito ya ma neurotransmitters ndikulimbikitsa malingaliro a chisangalalo ndi mphamvu, motero kupanga chilimbikitso. Kumatikakamiza kukwaniritsa zolinga zathu ndikupeza mphotho.
Dopamine imapangidwa m'malo osiyanasiyana muubongo, kuphatikizapo substantia nigra ndi ventral tegmental area. Malo awa amagwira ntchito ngati mafakitale a dopamine, kupanga ndikutulutsa neurotransmitter iyi m'malo osiyanasiyana muubongo. Dopamine ikatulutsidwa, imagwirizana ndi ma receptors enaake (otchedwa dopamine receptors) omwe ali pamwamba pa selo yolandirira.
Pali mitundu isanu ya ma dopamine receptors, omwe amalembedwa kuti D1 mpaka D5. Mtundu uliwonse wa receptor uli m'dera lina la ubongo, zomwe zimapangitsa kuti dopamine ikhale ndi zotsatira zosiyana. Pamene dopamine imamatira ku receptor, imasangalatsa kapena kuletsa ntchito ya selo yolandira, kutengera mtundu wa receptor yomwe yalumikizidwa nayo.
Dopamine imagwira ntchito yofunika kwambiri pakulamulira mayendedwe mu njira ya nigrostriatal. Mu njira iyi, dopamine imathandiza kulamulira ndikugwirizanitsa ntchito za minofu.
Mu prefrontal cortex, dopamine imathandiza kulamulira kukumbukira ntchito, zomwe zimatilola kusunga ndikusintha chidziwitso m'maganizo mwathu. Imagwiranso ntchito pakuyang'anira ndi kupanga zisankho. Kusalingana kwa kuchuluka kwa dopamine mu prefrontal cortex kwagwirizanitsidwa ndi matenda monga attention deficit hyperactivity disorder (ADHD) ndi schizophrenia.
Kutulutsidwa ndi kulamulidwa kwa dopamine kumayendetsedwa bwino ndi ubongo kuti ukhalebe bwino ndikuwonetsetsa kuti ntchito yake ikuyenda bwino. Dongosolo lovuta la njira zoyankhira, lokhudzana ndi ma neurotransmitters ena ndi madera a ubongo, limayang'anira kuchuluka kwa dopamine.
Dopamine ndi mankhwala otumiza mauthenga, kapena neurotransmitter, muubongo omwe amanyamula mauthenga pakati pa maselo amitsempha. Imagwira ntchito yofunika kwambiri pa ntchito zosiyanasiyana zaubongo, kuphatikizapo kuwongolera mayendedwe, malingaliro, ndi mayankho amalingaliro, zomwe zimapangitsa kuti ikhale gawo lofunika kwambiri pa thanzi lathu la maganizo. Komabe, kusalingana kwa kuchuluka kwa dopamine kungayambitse mavuto osiyanasiyana azaumoyo wamaganizo.
●Kafukufuku akusonyeza kuti anthu omwe ali ndi vuto la kuvutika maganizo angakhale ndi dopamine yochepa m'madera ena a ubongo, zomwe zimapangitsa kuti asakhale ndi chilimbikitso komanso chisangalalo pa zochita zawo za tsiku ndi tsiku.
●Kuchuluka kwa dopamine m'magazi kungayambitse matenda a nkhawa. Kuchuluka kwa dopamine m'malo ena a ubongo kungayambitse nkhawa komanso kusakhazikika.
●Kuchuluka kwa dopamine m'madera enaake a ubongo kumaganiziridwa kuti kumathandizira zizindikiro za schizophrenia, monga kuona zinthu molakwika ndi kuganiza molakwika.
●Mankhwala osokoneza bongo ndi zizolowezi zoledzera nthawi zambiri zimawonjezera kuchuluka kwa dopamine muubongo, zomwe zimapangitsa kuti munthu azisangalala komanso azisangalala. Pakapita nthawi, ubongo umadalira zinthuzi kapena zizolowezi zimenezi kuti utulutse dopamine, zomwe zimapangitsa kuti munthu azizoloŵera chizolowezicho.
Q: Kodi mankhwala angagwiritsidwe ntchito poletsa kuchuluka kwa dopamine?
A: Inde, mankhwala ena, monga dopamine agonists kapena dopamine reuptake inhibitors, amagwiritsidwa ntchito pochiza matenda okhudzana ndi dopamine dysregulation. Mankhwalawa angathandize kubwezeretsa dopamine bwino muubongo ndikuchepetsa zizindikiro zokhudzana ndi matenda monga Parkinson's kapena kuvutika maganizo.
Q: Kodi munthu angasunge bwanji dopamine bwino?
A: Kukhala ndi moyo wathanzi, kuphatikizapo kuchita masewera olimbitsa thupi nthawi zonse, kudya zakudya zopatsa thanzi, kugona mokwanira, komanso kuchepetsa kupsinjika maganizo, kungathandize kuti dopamine iyambe kugwira ntchito bwino. Kuchita zinthu zosangalatsa, kukhazikitsa zolinga zomwe zingatheke, komanso kuchita zinthu mosamala kungathandizenso kuti dopamine ikhale yofanana.
Chodzikanira: Nkhaniyi ndi yongofuna kudziwa zambiri ndipo siyenera kuonedwa ngati upangiri wa zachipatala. Nthawi zonse funsani katswiri wa zaumoyo musanagwiritse ntchito zowonjezera zilizonse kapena kusintha njira yanu yazaumoyo.
Nthawi yotumizira: Sep-15-2023


