This Nerve of the Brachial Plexus Supplies All the Extensor

Question

This nerve of the brachial plexus supplies all the extensor muscles of the upper limb.
A) median
B) musculocutaneous
C) ulnar
D) radial

Accepted Answer

The radial nerve, originating from the brachial plexus, is responsible for innervating all the extensor muscles of the upper limb, enabling extension at the elbow, wrist, and fingers.