TsimScience

Ntawd tas forebrain thiab dab tsi tso cai nws ua

Lub forebrain yog lub feem ntau rostral ceg ntawm poob siab system. Nws muaj lub cerebral hemispheres (lub cortex) thiab cov basal ganglia. Cov yav tas, ua nyob rau hauv lub cortex, nyob nruab nrab ntawm lub frontal qhov chaw ntawm lub paj hlwb thiab diencephalon. Muaj pes tsawg leeg ntawm cov nuclear lug xws li cov caudate nucleus, lub plhaub, uas ua ke tshwm sim tawm lub corpus striatum. Nws lub npe nws tau txais raws li ib tug tshwm sim ntawm cov alternation ntawm grey teeb meem, muaj li ntawm paj hlwb, thiab dawb. Cov ntsiab, ua ke nrog cerebral daj ntseg pob, uas yog hu ua pallidum daim ntawv striopallidarnoy system. Qhov no system nyob rau hauv cov tsiaj, nrog rau cov tib neeg, yog ib qho loj nuclear ntaus ntawv thiab yog muab kev koom tes nyob rau hauv cov txheej txheem ntawm lub cev muaj zog tus cwj pwm thiab lwm yam tseem ceeb functions.

Muaj pes tsawg leeg ntawm lub basal ganglia yog subcortical nuclei muaj miv heev cellular muaj pes tsawg leeg. Lub globus pallidus yog loj thiab me me neurons. Striatum cell muaj ib tug zoo li lub koom haum. Rau neurons striopallidarnoy systems mus impulses los ntawm lub cerebral cortex, thalamus, qia nuclei.

Yuav ua li cas yog cov kev khiav dej num subcortical nuclei?

Ntsiav striopallidarnoy systems muab kev koom tes nyob rau hauv lub cev muaj zog sib haum thiab lub cev muaj zog ua si. Stimulation ntawm lub caudate nucleus, yog tig taub hau stereotypical cim thiab tuav taw ntawm lub caj npab los yog forelimbs tsiaj. Nyob rau hauv tus txheej txheem ntawm kev kawm rau hauv lub striatum, nws yog pom tias nws muaj ib tug luag hauj lwm nyob rau hauv cov txheej txheem ntawm memorizing taw. Voos cov qauv no yog yuam tus txheej txheem ntawm lub cim xeeb thiab kev kawm. Striopallidarnoy system niamntiav inhibitory los rau locomotor kev ua si thiab nws lub siab lub ntsws yam, xws li lub txhoj puab heev cov tshuaj tiv thaiv.

Cov tawv ntawm lub cerebral hemispheres

Lub forebrain muaj xws li kev kawm ntawv, uas yog hu ua cov kaub puab. Nws yog suav hais tias yog yau tsim ntawm lub paj hlwb. Morphologically, lub cortex yog muaj li ntawm grey teeb meem uas npog tag nrho cov hlwb thiab muaj ib tug loj cheeb tsam vim heev heev folds thiab convolutions. Cov grey teeb meem muaj ib tug lossis loj tus naj npawb ntawm cov hlab hlwb. Vim li no cov lub xov tooj ntawm synaptic kev sib txuas yog heev loj, nws muab cia thiab ua cov ntaub ntawv tau txais. Nyob rau lub hauv paus ntawm cov tsos thiab evolution, cais ancient, qub thiab tshiab ua kiav txhab. Thaum lub sij hawm lub evolution ntawm lub mammalian neocortex tsim tshwj xeeb tshaj yog sai sai. Ancient tawv nyob rau hauv nws muaj pes tsawg leeg muaj lub olfactory qhov muag thiab tracts, lub olfactory tubercles. Tus qauv ntawm lub qub ib feem ntawm cingulate gyrus, amygdala thiab hippocampal gyrus. Qhov seem cheeb tsam belongs rau lub neocortex.

Lub paj hlwb ntawm lub cerebral cortex cov txheej txheem ntawm nyob rau hauv khaubncaws sab nraud povtseg thiab orderly yam, nyob rau hauv cov qauv txoj kev rau khaubncaws sab nraud povtseg:

1 - hu ua molecular, tsim plexus paj fibers thiab muaj ib tug tsawg kawg nkaus naj npawb ntawm cov paj hlwb.

2nd - hu ua txheej grainy. Nws muaj me me neurons ntawm nyias daim, zoo ib yam li cov nplej.

Peb - yog muaj li ntawm pyramidal neurons.

4 - nrog granular, zoo li lub txheej txheej, muaj me me neurons.

5 - muaj Betz hlwb (giant pyramidal hlwb). Dab ntawm cov hlwb (axons) tsim lub pyramidal huam, uas nce mus txog lub caudal feem thiab kis nyob rau hauv pem hauv ntej hauv paus hniav ntawm cov leeg nrob qaum.

6 - multiforme muaj neurons voos thiab fusiform.

Txawm hais tias neural koom haum ntawm lub cortex muaj ntau heev yuav ua li cas, ib tug xav paub ntau dua txoj kev tshawb no nws pom qhov sib txawv uas tshwm sim nyob rau hauv lub fibers, qhov luaj li cas thiab tus naj npawb ntawm hlwb thiab lawv branching detritus. Los ntawm kev kawm tib neeg lub hlwb cortex daim ntawv qhia tau npaj, uas muaj xws li cov cheeb tsam 11 thiab 52 ntawm lub teb.

Kuv lub luag hauj lwm rau dab tsi forebrain?

Heev feem ntau cov laus thiab cov laus daim tawv ua ke. Lawv tsim lub olfactory hlwb. Lub forebrain yog tseem lub luag hauj lwm rau nastorazhivanie thiab saib xyuas, koom rau hauv autonomic tshua. Lub system yuav siv sij hawm yog ib feem nyob rau hauv lub tsim ntawm muaj peev xwm coj tus cwj pwm thiab tus cwj pwm txawv. Nyob rau hauv cov tsiaj thwmsim, thaum voos qub tawv tshwm sim los txuam nrog lub digestive system: ntxo, nqos, peristalsis. Nws tseem yog khaus rau lub tonsils ua rau ib tug kev hloov nyob rau hauv cov kev ua ntawm hauv nruab nrog cev (lub raum, lub tsev me nyuam, lub zais zis). Ib txhia qhov chaw ntawm lub cortex yog muab kev koom tes nyob rau hauv tus txheej txheem ntawm memorizing.

Ua ke lub hypothalamus, lub limbic cheeb tsam thiab lub forebrain (ancient thiab qub tawv) daim ntawv lub limbic system, uas tswj homeostasis thiab saib kuas lub preservation ntawm lub hom.

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