<prompt> Which nerve is used for monitoring anesthesia during surgery?RadialUlnarFacialMedian  <response>: Ref. Oxford textbook of anesthesia. Page. 449 Ulnar nerve is monitored because ulnar nerve supplies adductor pollicis muscle which is monitored for neuromuscular blockade during anaesthesia Nerve Injuries in anesthesiaIn the supine position the main nerves at risk are:Brachial plexus excessive abduction and extension of the shoulder, especially if the head is turned away from the abducted arm,Ulnar nerve direct compression in ulnar groove, especially if the hand is supinated, or stretching by acute elbow flexionRadial nerve arm allowed to hang over the side of the operating tableSupraorbital compression by the facemask 