The function of the gamma motor neuron is to
A) detect changes in the muscle fiber length.
B) stimulate the muscle to contract.
C) limit the degree of contraction of the muscle.
D) coordinate the contraction of extensor and flexor muscles.
E) control the sensitivity of the muscle spindle.

Question

Quizplus · Accepted Answer

The function of the gamma motor neuron is to control the sensitivity of the muscle spindle. This is achieved by regulating the degree of contraction of the intrafusal muscle fibers within the muscle spindle, which affects the receptor's response to changes in muscle length. The gamma motor neuron does not stimulate the muscle to contract, limit the degree of contraction of the muscle, or coordinate the contraction of extensor and flexor muscles.

The Function of the Gamma Motor Neuron Is to