unmyelinated fiber


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unmyelinated fiber

(ŭn-mī′ə-lĭ-nā′tĭd)
n.
Any of the nerve fibers that lack a fatty myelin sheath but like other nerve fibers are enveloped by a sheath of Schwann cells.

unmyelinated fiber

A nerve fiber that lacks a myelin sheath, although a neurilemma may be present in the peripheral nervous system.
See also: fiber
References in periodicals archive ?
Myelinated fibers are thought to be faster at conducting pain and other sensory stimuli than unmyelinated fibers. They also increase the brain's ability to participate in cognitive processing.
Another example of the technique's utility is in multiple sclerosis, which can involve both myelinated and unmyelinated fibers. "DT-MRI is the only technique that highlights some unmyelinated fibers, where conventional techniques don't allow you to see them," Dr.
In multiple sclerosis, "DT-MRI is the only technique that highlights some unmyelinated fibers, where conventional techniques don't allow you to see them," Dr.
The mice exhibited a significant reduction in tremors and neural symptoms posttransplant, and the investigators detected remyelination of previously unmyelinated fibers.