Unlike the PNS, most CNS axons are myelinated, and several axons may be myelinated by a single cell. This adds further economy of space and energy. On the other hand the high level of complexity of the CNS white matter makes it vulnerable. There are several different kinds of disease ...
The ZMB is innervated by axons descending from the facial nerve; after amputation, damaged axons regrow into the regenerating barbel shaft and make connections to epithelial taste buds (LeClair & Topczewski, 2010). We sought to determine whether ZMB axons are myelinated, and, if so, whether...
White matter of the brain and spinal cord is susceptible to anoxia and ischemia. Irreversible injury to this tissue can have serious consequences for the overall function of the CNS through disruption of signal transmission. Myelinated axons of the CNS are critically dependent on a continuous suppl...
AXOLEMMAL specialisations are known to exist along myelinated fibres in the adult vertebrate central nervous system (CNS), particularly at nodes, between the axon and the oligodendrocyte and at presynaptic sites 1 . However, modified regions of axonal membrane have not been described in relation ...
CONDUCTION PROPERTIES OF CENTRAL DEMYELINATED A ND REMYELINATED AXONS, AND THEIR RELATION TO SYMPTOM PRODUCTION IN DEMYELINATING DISORDERS KENNETH J. SMITH London SUMMARY The conduction properties of central demyelinated and remyelinated axons are discussed, and related to the expression of ...
In addition to changes in myelin thickness and de novo myelination of previously non-myelinated axons or axonal segments, myelin plasticity involves modulation of nodes of Ranvier [18], small unmyelinated segments between myelin sheaths which enable saltatory conduction [19]. They consist of ...
III., Non- myelinated axons are rare in the medullary pyramids of the macaque monkey, Neurosci. Lett., 73 (1987) 215-219.Ralston DD, Milroy AM, Ralston HJ. Non-myelinated axons are rare in the medullary pyramids of the macaque monkey. Neurosci Lett 73: 215-219, 1987....
After 36 weeks, sprouting of sensory axons into the end-to-side coapted nerve was assessed by the electrophysiologic measurements of compound action potential and by counting the myelinated axons. The neurons in the dorsal root ganglia (DRG) L5 whose axons sprouted into the end-to-side coap...
Thus, information rate may be the main variable that sets axon caliber, with axons constrained to deliver information at the lowest acceptable rate. 展开 关键词: Animals Guinea Pigs Rats Optic Nerve Cerebellum Ganglia, Invertebrate Nerve Fibers, Myelinated Species Specificity Nerve Fibers, ...
Fill in the blank: A bundle of myelinated axons in the CNS is called a(n) ___. Fill in the blank: A bundle of myelinated axons in the PNS is called a(n) ___. Fill in the blank: Large multipolar neurons located in the cerebral cort...