Ukufumana Unokuthi Chaza Ukuphinda Kuxhatshazwe kakubi
Abasebenzisi bexesha elide be-cocaine banokulahlekelwa ezinye zekhono zabo lokukhumbula ngeempahla zabo kwaye bazikhumbule izixhobo zabo zokwenza izigqibo, ngokutsho kovavanyo lwe-MRI lobuchopho be-cocaine abusers.
Ukusetyenziswa kakubi kwe-cocaine ukuxhatshazwa ngokuthe ngqo kukungasebenzi kwimimandla yengqondo echaphazelekayo kwingcinga ephezulu kunye nokwenza izigqibo. Abaphengululi bathi ukulahlekelwa kwengqondo okubangelwayo kunokunceda ukuchaza isizathu sokuba abaxhaphazi be-cocaine baqhubeke besisebenzisa izidakamizwa okanye babuyele kuyo emva kokuziyeka.
Uhlolisiso luqhutywe nguDkt. Robert Hester weKholeji yaseTrinity eDublin, e-Ireland, kunye noDkt. Hugh Garavan weKholeji yaseTrinity kunye neKholeji yezoNyango yaseWisconsin eMilwaukee.
Umonakalo kwiNkqubo yeDopamine
"Izinto ezinokutshintsha izinto ezifana ne-cocaine zingonakalisa inkqubo ye-dopamine engqondweni, kwaye kukho i-concentration ephezulu ye-dopamine receptors kwingingqi yengqondo echaphazelekayo kwinkqubo yokwenza izigqibo," kusho uMlawuli we-NIDA uDkt. Nora D. Volkow, ukukhululwa kweendaba. "Ngokusebenzisa i-neuroimaging esebenzayo ukuhlola utshintsho lwe-neural oluvame ukuphumela ekusebenzisweni kakubi kwe-cocaine, aba nzu lulwazi baye bafumanisa enye inkalo yempembelelo ye-cocaine engqondweni enokukunceda ukucacisa ukuba kutheni abantu baqhubekeke kule miqobo ngaphandle kwemiphumo emibi."
Kulo cwaningo, izazinzulu zenze i-15 cocaine abahlukumezayo nabasetyhini abantu abangazange basebenzise iziyobisi. Umntu ngamnye othatha inxaxheba wayigqiba umsebenzi apho babona uluhlu lwememori yeetawu imizuzwana emibini kwaye "bahlaziya" uluhlu ngalunye lweemitha ezi-8.
Kamva bagxininisa iqhosha xa beboniswa ngencwadi engengenxalenye yoluhlu oludlulileyo. Ngethuba lo msebenzi, ubungqina benxaxheba bahlaziywa nge-imagination magnetic resonance imaging (MRI) ebonisa umsebenzi we-cell nerve ngexesha lo msebenzi othile.
I-Cocaine ichaphazela imisebenzi yaseBrains ephezulu
Abahlukumezi be-cocaine babengenanto echanekileyo kunokuba balawulwe.
Iingcali zenzululwazi zifumene ukuba iimfuno zokubamba imemori zifuna ukwandiswa kweendawo ezimbini zengqondo, i-cortex yangaphambili (ACC) kunye ne-prefrontal cortex.
Uphando uGevan Garavan uthi: "Uphando olwangaphambili oluhlolisise ukusebenza kwengqondo kwi-cocaine abahlukumezi babonakalisa umsebenzi owehlayo kwi-cortex yangaphambili. "Kodwa ukufundisisa kwethu kukuqala ukubonisa ukuba ubunzima bebasebenzisa i-cocaine banokuthi bavimbele izenzo zabo, ngokukodwa xa kuphakanyiswa amanqanaba aphezulu okuqiqa kunye nokwenza izigqibo, baxhamle ngokuthe ngqo kulo mandla ophantsi wokulawula umsebenzi kwi-ACC kunye nakwimimandla ye-prefrontal ngengqondo. "
Umthombo:
I-Garavan, H kunye no-Hester, R. "I-Dysfunction Executive in Cocaine Addiction: Ubungqina bokungasebenzi okuHlangeneyo, uCingulate, kunye neCerebellar." I-Journal ye-Neuroscience uDisemba 2004