The Ia Primary Afferents from M Uscle Spindles Carry Information

Question

The Ia primary afferents from m uscle spindles carry information mainly about the
A) Rate of stretch of the muscle
B) Static stretch of m uscle
C) Passive tension of the m uscle
D) Active tension of the m uscle
E) Stretch of the tendon

Accepted Answer

Ia primary afferents from muscle spindles are primarily involved in detecting the rate and degree of stretch in a muscle, rather than static stretch, passive tension, active tension, or stretch of the tendon. They are sensitive to quick changes in muscle length, providing feedback to the central nervous system to maintain muscle tone and support motor control.