Phrenic n Dorsal scapular n Medial trunk suprascapular n Inferior trunk Posterior Phrenic n First rib artery Long thoracic n Media Medial brachial Cutaneous n cutaneous nerve Median nerve Pectoral n Medial Antebrachial cutaneous Radial nerve Ulnar nerve Thoracodorsal Lateral Pectoral nPhrenic n Medial Pectoral n. Long thoracic n. Phrenic n. Dorsal scapular n. suprascapular n. Lateral Pectoral n. Medial Antebrachial Cutaneous n. Medial brachial Cutaneous n