The Expected Response to the Triceps-Jerk Reflex Is

Question

The expected response to the triceps-jerk reflex is
A)flexion of the forearm.
B)extension of the forearm.
C)plantar flexion.
D)flexion of the shoulder.

Accepted Answer

The triceps-jerk reflex is a monosynaptic reflex that tests the function of the C7 and C8 spinal cord segments. The expected response to this reflex is extension of the forearm, as the triceps muscle is the primary extensor of the elbow joint. Therefore, choice B is the correct answer. Flexion of the forearm (choice A), plantar flexion (choice C), and flexion of the shoulder (choice D) are not expected responses to the triceps-jerk reflex.