nonmyelinated nerve fiber

nonmyelinated nerve fiber

[-mī′əlinā′tid]

Etymology: L, non + Gk, myelos, marrow; L, nervus, nerve, fibra, fiber

a nerve fiber that lacks the fatty myelin insulating sheath. Such fibers form the gray matter of the nervous system, as distinguished from the white matter of myelinated fibers. Also called nonmedullated nerve fiber.

nonmyelinated nerve fiber

A nerve fiber without a myelin sheath.

See also: nerve fiber