Gamma motor neurons prepare the body to sense a change in what parameter?

Gamma motor neurons prepare the body to sense a change in what parameter?

• A. Change in Length
• B. Change in Temperature
• C. Change in Speed
• D. Change in Pressure

Answer: (A)

Gamma motor neurons adjust how sensitive the muscle spindle is to stretch. They innervate the intrafusal fibers inside the spindle, keeping the spindle taut so it remains responsive even as the muscle shortens or contracts. This tuning lets the spindle detect small changes in muscle length and send accurate signals to the nervous system, enabling proprioception and appropriate reflexes. Temperature, speed, and pressure involve different receptors and pathways, not the gamma drive on the muscle spindle.

Gamma motor neurons adjust how sensitive the muscle spindle is to stretch. They innervate the intrafusal fibers inside the spindle, keeping the spindle taut so it remains responsive even as the muscle shortens or contracts. This tuning lets the spindle detect small changes in muscle length and send accurate signals to the nervous system, enabling proprioception and appropriate reflexes. Temperature, speed, and pressure involve different receptors and pathways, not the gamma drive on the muscle spindle.