Question

Muscle spindles are innervated by:

A) Type 1b sensory neurons only
B) Gamma motor neurons, type 1a and II sensory neurons
C) Alpha and gamma motor neurons
D) Gamma motor neurons only
E) Gamma motor neurons and type 2x sensory neurons

Answer 1

Muscle spindles are innervated by a combination of gamma motor neurons, type 1a and II sensory neurons.B) Gamma motor neurons, type 1a and II sensory neurons

Step-by-step explanation:

Muscle spindles are innervated by a combination of gamma motor neurons, type 1a and II sensory neurons. Gamma motor neurons are responsible for regulating the sensitivity of the muscle spindles, while type 1a sensory neurons transmit information about muscle lengthening. Type II sensory neurons also play a role in proprioception and detecting changes in muscle length. Therefore, option B) Gamma motor neurons, type 1a and II sensory neurons is the correct answer.