The myotatic reflex is initiated by a Activation of muscle s

The myotatic reflex is initiated by:

a. Activation of muscle spindle stretch receptors

b. Activation of Golgi tendon organs in the intrafusal muscle fiber

c. The force of extrafusal muscle fibers contraction

d. Activation of slowly-adapting pressure receptors in the intrafusal muscle fiber

e. Activation of rapidly-adapting vibration receptors in the skin

Solution

A. Activation of muscle spindle stretch receptors.

Myotactic reflex occurs in response to stretching of muscle. Whenever a muscle is stretched suddenly, excitation of spindles causes reflex contraction of the large skeletal muscle fibers of the same muscle.