Inkqubo ye-nervous ihlelwe ngendlela ehlekisayo. Ulwazi olusuka nakubomi luvela "kwengqondo," ukwenzela ukuba uhlangothi lwesobunxele lwengqondo lulawule kwaye lufumana ulwazi ukusuka kwicala lasekunene lomzimba. Ngokufanayo, kwicala lesobunxele lomzimba lilawulwa ngecala lasekunene kwengqondo.
Amagulane emlanjeni womlenze alandele indlela ehleliweyo njengoko agijimela ebuchosheni.
Iindidi ezifanayo zeentsholongwane zihamba ndawonye ngendlela ehleliweyo.
Ngokomzekelo, iimbilini ezibona ukunyakaza, ukuchukumisa ukukhanya, kunye nomhlaba (apho umzimba uphakathi kwendawo) bonke bangena umgca wokugcoba kwaye bakhuphuke kwizinto ezibizwa ngokuba yimikholomu yokugqithisa ukuya kwengqondo kwicala elifanayo njengelungu elingenasici. Ngokomlenze wesobunxele, umzekelo, iifayili zigijimela kwicala lesobunxele lomtya womthambo. Phantse kwi-brainstem, kunjalo, iifayili ziyawela ngaphesheya.
Oku kufana nendlela inkqubo ye-nervous iququzelela iifayili ezixelela inxalenye yomzimba ukuba ihambe. Ebuchopho, iimbombo zihlangene nomzimba njengelungu elingenasigxina, kodwa zitshintshela ngaphantsi kwe-brainstem. Ngokomzekelo, icala langasobunxele lobuchopho lithumela iimpawu eziza kuhamba kwicala lasekunene lomtya womgogodla ngaphambi kokuphuma kwisandla sokunene. Icala lasekhohlo lobuchopho, ngoko, lilawula icala elifanelekileyo lomzimba.
Ngokwahlukileyo, iimbilini ze-nervous ezibona ukuvakalelwa njengentlungu kunye nokushisa akudluli kwi siseko sobuchopho kodwa kunoko bawela ngokukhawuleza nje xa bangena umgca womgca kwisandla okanye umlenze. Iifayili kwicala lesobunxele lomtya womgudu unalo intlungu kunye neqondo lokushisa kweentambo ezisuka kwinqanaba lekunene nomlenze.
Iifayili zinokwenyuka ngamanqanaba ambalwa ngaphambi kokuwela, nangona kunjalo.
Umonakalo oKhethekileyo
Ngoko kwenzeka ntoni ukuba isiqingatha sentambo yomgogodla ingonakaliswe? Iimfayili eziphazamisekile zibandakanya ukugubha, ukuthinteka okulula, kunye nokuvela kumgama omnye komzimba njengesihlunu. Ulawulo lomzimba luwonakaliswe ngaphesheya. Nangona kunjalo, intlungu kunye neqondo lokushisa liza kulahlekelwa kwicala eliphambene nomzimba, ngokuphindaphindiweyo omnye okanye amabini amacandelo phantsi kwemazi.
Le nto yaqala ukuchazwa nguCharles Édouard Brown-Séquard ngowe-1850, ochaze into eyaziwa ngokuba yi-Brown-Séquard syndrome xa kufundwa abalimi belimele ngelixa beka i-sugar sugar eRiphabhliki yaseMauritius. Isizathu esona siqhelekileyo sale syndrome sihlala sisilimaza ngokukrakra kwinxalenye nje yangemva. Ngenxa yokuba isilonda sidinga ukuchithwa ngokucacileyo isigxina sentambo yomgogodla, ihlala ingabonakali kodwa iyakunceda ukubonisa ukusebenza komgca wesipelini.
Ukuba umntu unenkathazo ye-Brown-Séquard syndrome, ukucinga ngomfanekiso wamagnetic kungasetyenziselwa ukuqinisekisa isizathu nendawo yokulimala. Ukongeza kwintlungu, izilonda ezifana nezifo, ukuvuvukala, okanye iimvumi zingakhokelela kwi-Brown-Séquard. Unyango luya kuxhomekeka kwimeko yesilonda.
Imithombo:
I-Hal Blumenfeld, i-Neuroanatomy ngokusebenzisa iiKliniki zeeKliniki. I-Sunderland: Abapapashi be-Sinauer Associates 2002.
I-Ropper AH, i-Samuels MA. I-Adams kunye neMigaqo yeVictor ye-Neurology, 9th: I-McGraw-Hill Companies, Inc., 2009.