Sciatic division — FRCA Primary MCQ
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Correct answer: B — Tibial and common fibular nerves
The sciatic nerve divides into tibial and common fibular nerves. Carotid sheath vagus nerve is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Cricothyroid membrane 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 jugular vein anterolateral to carotid artery 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