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Descriptor in English: Nerve Fibers, Myelinated
Descriptor in Spanish: Fibras Nerviosas Mielínicas
Descriptor in Portuguese: Fibras Nervosas Mielinizadas
Descriptor in French: Neurofibres myélinisées
Entry term(s): A Fiber
A Fibers
B Fiber
B Fibers
Fiber, A
Fiber, B
Fiber, Myelinated Nerve
Fibers, A
Fibers, B
Fibers, Myelinated Nerve
Myelinated Nerve Fiber
Myelinated Nerve Fibers
Nerve Fiber, Myelinated
Tree number(s): A08.675.542.512
A11.671.501.512
A11.671.514
Scope note: A class of nerve fibers as defined by their structure, specifically the nerve sheath arrangement. The AXONS of the myelinated nerve fibers are completely encased in a MYELIN SHEATH. They are fibers of relatively large and varied diameters. Their NEURAL CONDUCTION rates are faster than those of the unmyelinated nerve fibers (NERVE FIBERS, UNMYELINATED). Myelinated nerve fibers are present in somatic and autonomic nerves.
Allowable Qualifiers: CH chemistry
CL classification
DE drug effects
EN enzymology
IM immunology
ME metabolism
MI microbiology
PA pathology
PH physiology
PS parasitology
RE radiation effects
TR transplantation
UL ultrastructure
VI virology
History Note: 1974 (1972); for B FIBERS use AUTONOMIC FIBERS, PREGANGLIONIC 1976-2002
See also the descriptors: White Matter MeSH
DeCS UI: 9606
Descriptor UI: D009413
Date Established: 1974/01/01
Date of Entry: 1999/01/01
Revision Date: 2014/06/13
Nerve Fibers, Myelinated - Preferred
Concept UI M0014650
Scope note A class of nerve fibers as defined by their structure, specifically the nerve sheath arrangement. The AXONS of the myelinated nerve fibers are completely encased in a MYELIN SHEATH. They are fibers of relatively large and varied diameters. Their NEURAL CONDUCTION rates are faster than those of the unmyelinated nerve fibers (NERVE FIBERS, UNMYELINATED). Myelinated nerve fibers are present in somatic and autonomic nerves.
Preferred term Nerve Fibers, Myelinated
Entry term(s) Fiber, Myelinated Nerve
Fibers, Myelinated Nerve
Myelinated Nerve Fiber
Myelinated Nerve Fibers
Nerve Fiber, Myelinated
A Fibers - Narrower
Concept UI M0014649
Scope note Type A fibers are the myelinated fibers ranging from 1-22 um in diameter with NEURAL CONDUCTION rates of 5-120 m/sec. They are the typical myelinated fibers of spinal nerves. Type A fibers are further subdivided into alpha, beta, gamma, and delta fibers.
Preferred term A Fibers
Entry term(s) A Fiber
Fiber, A
Fibers, A
B Fibers - Narrower
Concept UI M0002010
Scope note Type B fibers are the small myelinated fibers with a diameter up to 3 um and NEURAL CONDUCTION rates of 3-15 m/sec. They are mainly associated with the visceral autonomic nerves.
Preferred term B Fibers
Entry term(s) B Fiber
Fiber, B
Fibers, B



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