Video: Pyramidal Decussation tshwm sim nyob qhov twg?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
taw tes ntawm kev sib tshuam ntawm medulla thiab tus txha nqaj qaum uas lub cev muaj zog los ntawm cov hauv nruab nrab hauv nruab nrab nruab nrab hla nruab nrab. Cov fibers tom qab ntawd txuas ntxiv mus rau hauv tus txha caj qaum feem ntau yog cov kab mob corticospinal.
Ib yam li ntawd, nws tau nug, qhov pyramidal tract Decussation nyob qhov twg?
Nyob rau hauv lub hauv paus ntawm lub pyramids, kwv yees li 90% ntawm cov fibers nyob rau hauv lub corticospinal kab mob decussate , los yog tus ntoo khaub lig hla mus rau lwm sab ntawm lub hlwb, nyob rau hauv ib nras ntawm axons hu ua lub pyramidal kev sib tham.
Ib yam nkaus, nyob qib twg ntawm lub paj hlwb puas pyramidal Decussation tshwm sim? 9.1 Pyramidal tracts Cov no hu ua as pyramidal tracts thaum lawv crossover ntawm lub qib ntawm pyramids hauv medulla. Lawv yog cov sau ntawm lub cev muaj zog neuron fibers uas mus rau tus txha caj qaum (corticospinal) lossis lub hlwb (corticobulbar) thiab tswj lub cev muaj zog ua haujlwm ntawm lub cev.
Tsis tas li ntawd, lub pyramidal Decussation yog dab tsi?
Kev Txhais Lus Kho Mob ntawm kev txiav txim siab pyramidal : hla ntawm cov fibers ntawm corticospinal cov kab mob los ntawm ib sab ntawm lub hauv paus paj hlwb mus rau lwm qhov nyob ze ntawm kev sib tshuam ntawm medulla thiab tus txha caj qaum. - tseem hu ua kev hais lus ntawm cov pyramids.
Qhov kev txiav txim siab hnov qab nyob qhov twg?
Cov kev txiav txim siab los yog kev hais lus ntawm lemniscus yog a kev hais lus lossis hla hla ntawm axons los ntawm cov keeb kwm gracile thiab cuneate nucleus. Cov fibers ntawm no kev hais lus yog hu ua internal arcuate fibers thiab muaj nyob rau ntawm lub superior nam ntawm lub kaw medulla superior rau lub cev muaj zog kev hais lus.
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