- intrafusal fibers
- modified muscle fibers which, surrounded by fluid and enclosed in a connective tissue envelope, compose the muscle spindle.
Medical dictionary. 2011.
intrafusal fibers
Look at other dictionaries:
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
intrafusal — Applied to structures within the muscle spindle. * * * in·tra·fu·sal fyü zəl adj situated within a muscle spindle <intrafusal muscle fibers> compare EXTRAFUSAL * * * in·tra·fu·sal (in″trə fuґzəl) [intra + fusus] pertaining… … Medical dictionary
extrafusal fibers — ordinary muscle fibers, as opposed to the intrafusal fibers of the muscle spindle … Medical dictionary
fusimotor fibers — efferent A fibers that innervate the intrafusal fibers of the muscle spindle; see also gamma f s. Called also fusimotor axons … Medical dictionary
General somatic efferent fibers — Scheme showing structure of a typical spinal nerve. 1. Somatic efferent. 2. Somatic afferent. 3,4,5. Sympathetic efferent. 6,7. Sympathetic afferent. Gray s … Wikipedia
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
Nuclear chain fiber — A muscle spindle, with γ motor and Ia sensory fibers Latin myofibra catenaformis Code TH … Wikipedia
Fiber — The parts of plants that cannot be digested, namely complex carbohydrates. Also known as bulk or roughage. Complex carbohydrates from plants are rich in starch and fiber. Examples of plants that provide complex carbohydrates (fiber) are fresh… … Medical dictionary
spindle — In anatomy and pathology, any fusiform cell or structure. [A.S.] aortic s. a fusiform dilation of the aorta immediately beyond the isthmus. SYN: His s.. central s. a central group of microtubules (continuous fib … Medical dictionary
Type Ia sensory fiber — also called Primary Afferent Fiber is a type of sensory fiber. It is a component of a muscle fiber s muscle spindle which keeps track of how fast a muscle stretch changes (the velocity of the stretch).Function of muscle spindlesIn order to… … Wikipedia
