The sensitivity of the muscle spindle is maintained by __________.
A) a stretch reflex
B) alpha motor neurons
C) gamma motor neurons
D) anulospiral endings
E) secondary afferent (group II)fibers

Question

Quizplus · Accepted Answer

The sensitivity of the muscle spindle is maintained by gamma motor neurons. These neurons innervate the intrafusal fibers of the muscle spindle, causing them to contract, which maintains tension on the sensory endings of the muscle spindle. This ensures that the muscle spindle remains sensitive to changes in muscle length, which is necessary for proper proprioception and motor control. The other options listed are involved in the function of the muscle spindle or the stretch reflex, but do not directly maintain the sensitivity of the muscle spindle.

The Sensitivity of the Muscle Spindle Is Maintained by __________