Which nerve innervates the flexor carpi radialis and what is its primary action?

Which nerve innervates the flexor carpi radialis and what is its primary action?

• A. Ulnar Nerve; Flexes Wrist and Abducts Hand
• B. Median Nerve; Flexes Wrist and Abducts Hand
• C. Radial Nerve; Extends Wrist and Abducts Hand
• D. Musculocutaneous Nerve; Flexes Elbow

Answer: (B)

Understanding which nerve supplies a forearm flexor and what that muscle does helps connect nerve to action. The flexor carpi radialis is innervated by the median nerve and its primary actions are flexion of the wrist and abduction of the hand (radial deviation). That combination matches the option describing the median nerve with wrist flexion and radial deviation. The other nerves don’t fit because they either don’t innervate this muscle or imply the wrong action: the ulnar nerve doesn’t supply this muscle; the radial nerve mainly innervates wrist extensors, not flexors; and the musculocutaneous nerve flexes the elbow, not the wrist.

Understanding which nerve supplies a forearm flexor and what that muscle does helps connect nerve to action. The flexor carpi radialis is innervated by the median nerve and its primary actions are flexion of the wrist and abduction of the hand (radial deviation). That combination matches the option describing the median nerve with wrist flexion and radial deviation.

The other nerves don’t fit because they either don’t innervate this muscle or imply the wrong action: the ulnar nerve doesn’t supply this muscle; the radial nerve mainly innervates wrist extensors, not flexors; and the musculocutaneous nerve flexes the elbow, not the wrist.