muscle spindle

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muscle spindle

n.
A sensory receptor in a muscle that responds to the stretching of tissue. Also called stretch receptor.

mus′cle spin`dle

n.
a proprioceptor in skeletal muscle, composed of muscle fibers and nerve endings, that conveys information on the state of muscle stretch. Also called stretch receptor.
[1890–95]
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References in periodicals archive ?
2) The botulinum toxin injection blocks the extrafusal and intrafusal release of acetylcholine, and effectively reduces the Ia and II afferent signal from the muscle spindle organs and the muscle tone by reflex inhibition without affecting muscle strength.
On the spinal level, botulinum toxin is capable of producing reflex inhibition of the muscle spindle organ.