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Multiple Choice
What is the expected response to the triceps-jerk reflex?
A
Flexion of the forearm
B
Extension of the forearm
C
Flexion of the wrist
D
Extension of the wrist
Verified step by step guidance
1
Understand the triceps-jerk reflex: It is a deep tendon reflex that tests the function of the C7 and C8 spinal nerves and the radial nerve.
Identify the muscles involved: The triceps brachii muscle is the primary muscle involved in this reflex.
Determine the action of the triceps brachii: The triceps brachii is responsible for the extension of the forearm at the elbow joint.
Analyze the reflex action: When the triceps tendon is tapped, it should cause a contraction of the triceps muscle, leading to the extension of the forearm.
Conclude the expected response: Based on the function of the triceps brachii, the expected response to the triceps-jerk reflex is the extension of the forearm.