Brachial plexus roots — FRCA Primary MCQ
Instant feedback + full explanation. One question, done properly.
Educational content. Not a substitute for clinical judgement or local policy.
Reveal the answer and explanation
Correct answer: A — C5 to T1 roots
The brachial plexus is formed mainly by C5 to T1 ventral rami. Carotid sheath vagus nerve is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Obturator 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. 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