Radial Nerve Extensors — FRCA Primary MCQ

Instant feedback + full explanation. One question, done properly.

EasyAnatomyRadial Nerve ExtensorsFRCA Primary

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

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: E — 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