The musculocutaneous n. (1) innervates the coracobrachialis m. (2), the biceps brachii m. (3), and the brachialis m. (4). Also, the musculocutaneous n. sends a communicating branch (5) to the median nerve and ends as the medial cutaneous antebrachial n. (6). The median n. (7) and the ulnar n. (8) originate from a common trunk (9). The ulnar n. gives off the caudal cutaneous antebrachial n. (10). Identify the radial n. (11) passing laterally and the thoracodorsal n. (12). Branches of the axillary n. are evident (arrows).

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