unmyelinated


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un·my·e·lin·at·ed

 (ŭn-mī′ə-lĭ-nā′tĭd)
adj.
Lacking a myelin sheath. Used of a nerve fiber.

unmyelinated

(ʌnˈmaɪəlɪˌneɪtɪd)
adj
(of a nerve fibre) not having a myelin sheath
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.unmyelinated - (of neurons) not myelinated
medullated, myelinated - (of neurons) covered with a layer of myelin
References in periodicals archive ?
The individual myelinated axons and groups of unmyelinated axons are usually surrounded by the endoneurium.
It showed an increased number of flattened endoneurial fibroblast-like cells, with long cytoplasmic processes that wrapped the regenerating unmyelinated or thinly myelinated nerve fibres, in most of the specimens.
Pain is transmitted to the central nervous system (CNS) in two separate ways via myelinated A delta fibers and unmyelinated C fibers, following the induction of nociceptors (3).
These are small diameter interstitial muscle/fascia receptors, 90% of which are unmyelinated free nerve endings.
[2] Degenerative changes are seen in both myelinated and unmyelinated neurons and because of that speed of conduction in both sensory and motor nerves along with coordination decreases.[3,4] Due to this, the time taken to react to a stimulus increases (reaction time) and is unable to respond immediately to auditory and visual cues.
The unmyelinated C afferent nerve fibers may be the most important sub-type in MC-activated sensory afferent in the GI tract (26).
The morphological changes in unmyelinated peripheral nerve fibers exposed to low sodium and high potassium concentrations.
[8] In addition to spinal cord, NMDA receptors have also been identified on peripheral unmyelinated sensory axons.
Effects of intracoronary administration of bradykinin on the impulse activity of afferent sympathetic unmyelinated fiber with left ventricular endings in the cat.
Residual cells and oligodendrocyte precursors that are still present in the adult CNS are afterwards activated and remyelination of the unmyelinated axons begins, although the thickness of the newly formed myelin sheath can never be fully restored, causing the remyelinized fibers to have slower conductivity of the nerve pulse compared to intact fibers.
The Sudoscan device assesses amyelinic sympathetic C-fibers which innervate the sweat glands while the MSA thermal stimulator assess myelinated A-delta fibers and unmyelinated C-fibers.