Obturator jerk — FRCA Primary MCQ
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Correct answer: E — Obturator nerve
The obturator nerve runs near the lateral bladder wall and supplies adductors. Ligamentum flavum is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Sacral epidural space is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. C3 to C5 roots 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. 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