Damage to the radial nerve in the spiral groove spares which muscle -: (A) Lateral head of triceps, (B) Long head of triceps, (C) Medial head of triceps, (D) Anconeus
Answer is B. The radial nerve while passing through the spiral groove gives away branches to lateral head and medial head of triceps. The medial head also receives fibers from portion of radial nerve that lies before the spiral groove, through medial muscular branch. Since this is a single answer type of question, the best answer would be long head of triceps.