muscle fiber

muscle fiber
A single cell of a muscle. Each muscle fibers contain many myofibrils, the contractile unit of muscles.

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  • muscle fiber — n any of the elongated cells characteristic of muscle * * * any of the cells of skeletal or cardiac muscle tissue. Skeletal muscle fibers are cylindrical multinucleate cells containing contracting myofibrils, across which run transverse… …   Medical dictionary

  • muscle fiber — noun an elongated contractile cell that forms the muscles of the body (Freq. 2) • Syn: ↑muscle cell, ↑muscle fibre • Hypernyms: ↑fiber, ↑fibre, ↑somatic cell, ↑vegetative cell …   Useful english dictionary

  • muscle fiber action potential — the action potential recorded on a muscle fiber spreading in both directions away from the plate region to initiate a contraction; see also single fiber electromyography …   Medical dictionary

  • muscle fiber — one of the structural cells of a muscle. [1875 80] * * * …   Universalium

  • muscle fiber — mus′cle fi ber n. cbl one of the structural cells of a muscle • Etymology: 1875–80 …   From formal English to slang

  • Intrafusal muscle fiber — Intrafusal fibers are muscle fibers that comprise the muscle spindle and are innervated by the gamma motor neurons (gamma motoneuron). These fibers are walled off from the rest of the muscle by a collagen sheath. This sheath has a spindle or… …   Wikipedia

  • Extrafusal muscle fiber — Extrafusal muscle fibers are a class of muscle fiber innervated by alpha motor neurons. They generate tension, do mechanical work and allow for movement by contracting.Compare with intrafusal muscle fiber is of sensory type and innervated by… …   Wikipedia

  • striated muscle fiber — noun an elongated contractile cell in striated muscle tissue • Syn: ↑striated muscle cell • Hypernyms: ↑muscle cell, ↑muscle fiber, ↑muscle fibre • Part Holonyms: ↑skeletal muscle, ↑ …   Useful english dictionary

  • Muscle spindle — Latin fusus neuromuscularis Code TH H3. Muscle spindles are sensory receptors within the belly of a muscle, which primarily detect changes in the length of this muscle. They convey length information to the central nervous system via …   Wikipedia

  • Muscle fatigue — is the decline in ability of a muscle to generate force. It can be a result of vigorous exercise but abnormal fatigue may be caused by barriers to or interference with the different stages of muscle contraction. There are two main causes of… …   Wikipedia

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