Radial Nerve Extensors — FRCA Primary MCQ

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EasyAnatomyRadial Nerve ExtensorsFRCA Primary

The radial nerve provides motor supply to which compartment of the arm and forearm?

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Correct answer: A — Extensor compartments of arm and forearm

The radial nerve (C5-T1) from the posterior cord supplies all extensors of the arm (triceps) and forearm (brachioradialis / extensors of wrist and fingers / supinator). Injury at the spiral groove causes wrist drop and loss of finger extension. Sensation is to the posterior arm / forearm / and dorsal hand (anatomical snuffbox).

Reference: RCoA 2021 Primary FRCA Curriculum