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muscle spindle

noun

  1. Cell Biology. a proprioceptor in skeletal muscle, composed of striated muscle fibers and sensory nerve endings in a connective tissue sheath, that conveys information via the spinal nerves on the state of muscle stretch, important in the reflex mechanism that maintains body posture.


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Word History and Origins

Origin of muscle spindle1

First recorded in 1890–95
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Example Sentences

Takeoka, A., Vollenweider, I., Courtine, G. & Arber, S. Muscle spindle feedback directs locomotor recovery and circuit reorganization after spinal cord injury.

From Nature

A "tendon spindle," very similar to the muscle spindle spoken of in the text, but found at the tendinous end of a muscle instead of embedded in the muscle substance itself, "a" indicates the tendon, and "e" the muscle fibers; "b" is a sensory axon, and "c" its end-brush about the spindle.

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