unmyelinated fibers(redirected from gray fibers)
Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.
fibers having no myelin covering, naked axons; in the central nervous system, represented by all axons lying in troughs of oligodendroglia, and in the peripheral nervous system, by all axons lying in troughs in a single Schwann cell (Schwann cell unit); slow-conducting fiber.
un·my·e·li·nat·ed fi·bers(ŭn-mī'ĕ-li-nā-tĕd fī'bĕrz)
Remak,Robert, Polish-German anatomist and histologist, 1815-1865.
Remak fibers - nerve fibers lacking a myelin sheath but, in common with others, enveloped by a sheath of Schwann cells. Synonym(s): unmyelinated fibers
Remak ganglia - (1) groups of nerve cells in the wall of the venous sinus where it joins the right atrium of the heart; - (2) autonomic ganglia in nerves of the stomach.
Remak nuclear division - direct division of the nucleus and cell, without the changes in the nucleus that occur in the ordinary process of cell reproduction. Synonym(s): amitosis
Remak plexus - a gangliated plexus of unmyelinated nerve fibers, derived chiefly from the superior mesenteric plexus, ramifying in the intestinal submucosa. Synonym(s): submucosal plexus