What are the nerves off the cords of the brachial plexus?
Lateral cord:
• Lateral pectoral nerve (C5, C6, C7)—to pectoralis minor
• Musculocutaneous nerve (C5, C6)—to brachialis and coracobrachialis (elbow flexion)
• Median nerve (partial; C6, C7)—to pronator teres, flexor carpi radialis, part of flexor digitorum superficialis, part of palmaris longus
Medial cord:
• Medial pectoral nerve (C8, T1)—to pectoralis major (shoulder adduction)
• Ulnar nerve (C8, T1)—ulnar wrist and long finger flexors
• Median nerve (partial; C8, T1)—long finger flexors and small hand muscles
• Medial brachial cutaneous nerve—skin over medial surface of arm and proximal forearm
• Medial antebrachial cutaneous nerve—skin over medial surface of forearm
Posterior cord:
• Upper subscapular nerve (C5, C6)—to subscapularis (medial rotation of the humerus)
• Thoracodorsal nerve (C6, C7, C8)—to latissimus dorsi (shoulder adduction)
• Lower subscapular nerve (C5, C6)—to teres major (adducts the humerus)
• Axillary nerve (C5, C6)—to deltoid (abduction of the humerus) and teres minor (lateral rotation of humerus)
• Radial nerve (C5, C6, C7, C8, T1)—to extensor muscles of upper limb