Injury to which of the following nerve in the diagram, may affect respiratory movements:: (A) A, (B) B, (C) C, (D) D
Answer is A. Injury to phrenic nerve (marker 'A') compromises diaphragm (and respiratory movements). Phrenic nerve ('A') is identified running anterior to scalenus anterior muscle option B - Sympathetic chain option C - Vagus nerve option D - Recurrent laryngeal nerve