intrafusal

intrafusal

 [in″trah-fu´zal]
pertaining to the striated fibers within a muscle spindle.

in·tra·fu·sal

(in'tră-fyū'săl),
Applied to structures within the muscle spindle.

intrafusal

/in·tra·fu·sal/ (-fu´z'l) pertaining to the striated fibers within a muscle spindle.

in·tra·fu·sal

(in'tră-fyū'zăl)
Applied to structures within the muscle spindle.

intrafusal

pertaining to the striated fibers within a muscle spindle.
References in periodicals archive ?
Gamma [chi] motorneurons, which transmit impulses to special skeletal muscle fibres, called intrafusal fibres, part of the muscle spindle.
Gamma motor neurons can adjust the sensitivity of the intrafusal fibers by innervating these intrafusal fibers of the muscle spindle (41).
Since intrafusal stretch receptor discharge frequency from Ia afferents can contribute up to 30% of the motoneuron excitation (Gandevia, 2001), SS-induced reductions in afferent excitability could adversely affect muscle force.
The phenomenon of muscle history is thought to arise from the spontaneous formation of stable, non-recycling intrafusal cross-bridges between actin and myosin filaments when muscle is held at constant length.
Its are composed of 3-12 intrafusal muscle fibers, of which there are three types:
The motoneuron plays a role in changing the length of the intrafusal fibers and adjusting sensitivity of the muscle spindles.
The second type of muscle fiber, intrafusal fibers, functions within muscle spindles and is innervated by gamma motor neurons and sensory Ia neurons (see Figure 1 ).
reported that a liquid diet and unilateral extraction cause a reduction in the diameter of extrafusal, and later intrafusal, fibers.
Using vertebral movement and intact paraspinal muscles to determine the distribution of intrafusal fiber innervation of muscle spindle afferents in the anethesized cat.
For example, stretch-shortening cycle fatigue appears to influence both extrafusal and intrafusal muscle, which may describe a form of neural fatigue (Avela and Komi, 1998; Avela et al.
When the release of acetylcholine is blocked, the denervation of the extrafusal and intrafusal muscle fibers occurs.
Supporting evidence is based on observations that state, vibration can only increase maximal isometric contraction force and EMG activity when fatigue is present in the intrafusal fibres (Bongiovanni and Hagbarth, 1990) or when a-fibre are blocked (Hagbarth et al.