S altatory conduction tshwm sim nyob rau hauv myelinated axons los ntawm ib qho ntawm Ranvier mus rau lub tom ntej node. Yog li, qhov ua tau zoo tsuas yog tsim los ntawm cov neurofibrils hauv myelinated axons. Li no, nws yog nrawm dua li txuas ntxiv.
Vim li cas ntsev thiaj ua tau sai?
Cov teeb liab hluav taws xob mus nrawm dua hauv axons uas tau thaiv nrog myelin. … Ua tej yam muaj peev xwm taug kev los ntawm axon "dhia" ntawm node mus rau ntawm node. Qhov no yog hu ua s altatory conduction uas txhais tau tias "leap." S altatory conduction yog txoj kev nrawm dua mus rau hauv axon dua li taug kev hauv axon yam tsis muaj myelin
Vim li cas ntsev ntsev hauv cov fibers myelinated nrawm dua?
1 Taw Qhia. Lub myelin sheath tsub kom axonal conduction tshaj tawm los ntawm kev txo lub peev xwm ntawm axonal membrane thiab tso cai rau s altatory conduction (Hodgkin, 1964; Stampfli, 1954). Yog li, myelinated axons ntawm txoj kab me me tuaj yeem xa cov ntaub ntawv sai npaum li qhov loj dua unmyelinatedaxons.
Yuav ua li cas s altatory conduction nce nrawm?
Tsis tsuas yog s altatory conduction nce qhov nrawm ntawm impulse kis tau tus mob los ntawm kev ua rau cov txheej txheem depolarization dhia ntawm ib ntawm mus rau lwm qhov, nws tseem txuag lub zog rau axon li depolarization nkaus xwb tshwm sim ntawm cov nodes thiab tsis raws tag nrho ntev ntawm cov paj hlwb, xws li nyob rau hauv unmyelinated fibers.
Vim li cas myelinated neurons sai dua?
Vim lub impulse 'dhia' hla thaj chaw ntawm myelin, ib qho impulse taug kev nrawm dua nrog myelinated neuron tshaj li ntawm cov neuron uas tsis yog myelinated. Kev nrawm ntawm cov hlab ntsha impulses tsis tsuas yog nyob ntawm myelination tab sis kuj nyob ntawm qhov tuab ntawm cov hlab ntsha.
