extrafusal fibers

extrafusal fibers
ordinary muscle fibers, as opposed to the intrafusal fibers of the muscle spindle.

Medical dictionary. 2011.

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  • extrafusal — ex·tra·fu·sal fyü zəl adj situated outside a striated muscle spindle <extrafusal muscle fibers> compare INTRAFUSAL * * * ex·tra·fu·sal (eks″trə fuґzəl) [extra + fusus] pertaining to striated muscle fibers outside the muscle… …   Medical dictionary

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  • Muscle spindle — Latin fusus neuromuscularis Code TH H3.11.06.0.00018 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

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  • 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

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