Ulnar Nerve Medial Epicondyle — FRCA Primary MCQ
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Correct answer: A — Medial epicondyle
The ulnar nerve passes behind the medial epicondyle of the humerus in the cubital tunnel (between the medial epicondyle and olecranon). It is superficial here and vulnerable to compression (the 'funny bone'). Ulnar nerve injury causes: claw hand (hyperextension at MCP joints 4-5 / flexion at IP joints) / weakness of interossei / and loss of sensation to the medial 1.5 fingers.
Reference: RCoA 2021 Primary FRCA Curriculum