Nerve | Derived from roots | Innervated muscles | Motor effect |
Musculocutaneous | C6 | Biceps brachii, coracobrachialis, brachialis | Elbow flexion, forearm supination |
Axillary | C5/C6 | Deltoid, teres minor | Shoulder abduction, external rotation |
Median | C5C6/C7/C8/T1 | Pronator teres, flexor carpi radialis, flexor digitorum superficialis, flexor digitorum profundus, palmaris longus, abductor pollicis brevis, opponens pollicis, flexor pollicis brevis, lumbricals | Flexion of wrist and digits, forearm pronation, wrist abduction, thumb abduction, flexion and opposition |
Radial | C5C6/C7/C8/T1 | Triceps, extensor carpi radialis, extensor carpi ulnaris, extensor pollicis, supinator | Extension at elbow, wrist and fingers; forearm supination |
Ulnar | C8/T1 | Flexor carpi ulnaris, lumbricals, interossei, adductor pollicis, opponens digiti minimi, abductor digitorum minimi, flexor digiti minimi brevis, flexor digitorum profundus | Wrist flexion and adduction, digit flexion, adduction and abduction, little finger opposition |