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Wrist drop — FRCA Primary MCQ

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HardAnatomyWrist dropFRCA Primary

After arm compression, a patient cannot extend the wrist. Which anatomical structure is described?

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

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Correct answer: E — Radial nerve

Radial nerve injury causes wrist drop. Femoral nerve is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Saphenous nerve is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Internal superior laryngeal nerve is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Divisions of the brachial plexus is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. In Primary FRCA anatomy, the tested structure should explain the block, airway sign or regional complication in the stem.

Reference: Ellis, Feldman & Harrop Anatomy for Anaesthetists; Primary FRCA textbooks