Dab tsi yog qhov projection fibre?
Dab tsi yog qhov projection fibre?

Video: Dab tsi yog qhov projection fibre?

Video: Dab tsi yog qhov projection fibre?
Video: Qhov Sib Txawv Ntawm Allergy, Flu & Coronavirus Yog Dab Tsi 2024, Lub Xya hli ntuj
Anonim

Projection fibers muaj ob qho tib si afferent thiab efferent paj hlwb fibers uas ob peb lub paj hlwb nrog tus txha nqaj qaum. Cov no qhov projection fibers yog cov hlab ntsha myelinated uas tau teeb tsa hauv kab hauv cov teeb meem dawb nyob ib puag ncig cov teeb meem grey. Dorsal kem xa cov ntaub ntawv somatic rau lub hlwb.

Los ntawm qhov ntawd, cov phiaj xwm phiaj xwm yog dab tsi?

Cov phiaj xwm phiaj xwm txuas vertically ntawm qhov siab dua thiab qis dua ntawm lub hlwb thiab cov chaw qaum qaum, thiab nqa cov ntaub ntawv ntawm cerebrum thiab lub cev tag nrho. Lwm yam projection daim ntawv nqa cov cim taw qhia mus rau lub paj hlwb.

Qhov thib ob, qhov projection fibers nyob qhov twg? Projection Fibers Cov no fibers txuas lub paj hlwb cortex nrog qis dua ntawm lub hlwb lossis lub paj hlwb thiab tus txha caj qaum, hauv ob qho kev qhia. Corticofugal (ua haujlwm zoo) fibers tawm los ntawm lub paj hlwb cortex mus rau thalamus, lub hlwb qia, lossis qaum qaum.

Hauv txoj kev no, kev koom nrog cov fibre yog dab tsi?

Kev sib koom tes fibers yog axons uas txuas rau thaj chaw cortical hauv tib lub paj hlwb. Hauv tib neeg neuroanatomy, axons (paj hlwb fibers ) hauv lub hlwb, tuaj yeem raug cais raws qhov lawv kawm thiab kev sib txuas zoo li kev sib koom tes fibers , qhov projection fibers , thiab commissural fibers.

Commissural fibers ua dab tsi?

Cov commissural fibers los yog transverse fibre yog axons uas txuas ob hemispheres ntawm lub hlwb. Nyob rau hauv sib piv rau commissural fibers , koom haum fibers txuas cov cheeb tsam hauv tib lub hemisphere ntawm lub hlwb, thiab kev kwv yees fibers txuas txhua cheeb tsam mus rau lwm qhov chaw ntawm lub hlwb lossis rau tus txha caj qaum.

Pom zoo: