myelinated fiber

Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.

Related to myelinated fiber: myelin sheath

myelinated fiber

(mī′ə-lə-nā′tĭd)

An axon enveloped by a myelin sheath formed by oligodendroglial cells in the brain and spinal cord or by Schwann cells in the peripheral nerves.

myelinated fiber

A nerve fiber whose axon (dendrite) is wrapped in a myelin sheath.

See also: fiber

References in periodicals archive ?

Myelinated fibers were identified by the presence of either NaD channel clusters at the nodes of Ranvier (data not shown) or MAG clusters at the paranodal regions.

Concentration of neddylation-related molecules in paranodal myelin of the peripheral nervous system

An efficient and unbiased stereological method was applied to estimate the white matter volume, the total volume, total length and mean diameter of the myelinated fibers in the white matter and the total volume of the myelin sheaths in the white matter of rat brain.

Application of stereological methods to study the white matter and myelinated fibers therein of rat brain

Genetically Modified hUCB-MCs Reversed the Degeneration of Myelinated Fibers in the White Matter of Contused Rat Spinal Cord.

Electrophysiological, Morphological, and Ultrastructural Features of the Injured Spinal Cord Tissue after Transplantation of Human Umbilical Cord Blood Mononuclear Cells Genetically Modified with the VEGF and GDNF Genes

The pathological changes of myelinated fibers were divided into 3 groups: (1) pure onion bulb formation, (2) onion bulb formation with axonal sprouts, and (3) focally thickened myelin with onion bulb structures or axonal sprouts.

Clinical and Pathological Variation of Charcot-Marie-Tooth 1A in a Large Chinese Cohort

Histograms of myelinated fiber axons for rats aged 4 and 7 weeks are presented for the first time.

Aspects of the Macro and Microscopic Anatomy of the Sciatic Nerve in Wistar Rats/Aspectos de la Anatomia Macro y Microscopica del Nervio Ciatico en Ratas Wistar

The G ratio values closer to 0.6 was defined by Rushton as the optimal ratio for the maximum conduction velocity of a myelinated fiber. The unimodal G ratio distribution, with peak at 0.6 observed in both sural and saphenous nerves indicates that animals with 30 days of life present myelinated fibers fully developed and prepared to the best spread of the current between two Ranvier nodes.

Hind Limb Sensory Innervation in Rats: Comparison between Sural and Saphenous Nerve Morphometry/Inervacion Sensorial de los Miembros Posteriores en Ratas: Comparacion Morfometrica entre los Nervios Sural y Safeno

Although the morphometric data of myelinated fibers showed about 44% of those fibers having larger diameter between 3 to 4 [micro]m as showed in Fig.

Ultrastructure of the myelinated and unmyelinated nerve fibers of the tongue mucosa of albinus rat (Wistar) with aging / Ultraestructura de las fibras nerviosas mielinicas y amielinicas de la mucosa lingual de ratas albinas (Wistar) envejecidas

(b) 30 min postketamine injection myelinated fibers (MyN) and spinal ganglion cells, vacuole-like structures (thin arrow).

Investigation of the histological changes in spinal nerve roots post intrathecal ketamine administration

Semithin transverse sections of the left sural nerve revealed a decreased density of large myelinated fibers, and the remaining fibers frequently presented with thin myelinated axon and onion bulb changes caused by the proliferation of Schwann cells.

A 'Triple Trouble' Case of Facioscapulohumeral Muscular Dystrophy Accompanied by Peripheral Neuropathy and Myoclonic Epilepsy

Our quantitative analysis showed a significant increase in the number of preserved myelinated fibers in the calpain inhibitor-treated group compared with those in the vehicle-treated group (Figure 3A).

Rescuing axons from degeneration does not affect retinal ganglion cell death

The mean diameter of the myelinated fibers and axons as well as the mean thickness of the myelin sheaths was measured.

Effects of D-Galactose on the Structure of Nerve Fibers in Cerebellar White Matter

Ultrastructural and morphometric studies of the peripheral nerves reveal loss of unmyelinated and small myelinated fibers and no innervation to the sweat glands.