Anterior forearm |
Pronator teres | Humeral head: medial epicondyle and supracondylar ridge of humerus Ulnar head: coronoid process of ulna | Midshaft of radius | Pronation and flexion of elbow | Median n. (C6–C7) |
Flexor carpi radialis | Medial epicondyle of humerus | Metacarpals 2 and 3 | Flexion and radial deviation of wrist; w elbow flexion | |
Palmaris longus | | Palmar aponeurosis | Flexion of wrist, weak elbow flexion, and tightens palmar aponeurosis | Median n. (C7–C8) |
Flexor carpi ulnaris | Humeral head: medial epicondyle Ulnar head: olecranon and posterior border of ulna | Pisiform, hamate, and metacarpal 5 | Weak elbow flexion, wrist flexion, ulnar deviation | Ulnar n. (C7–T1) |
Flexor digitorum superficialis | Medial epicondyle, coronoid process of the ulna and anterior border of the radius | Lateral surfaces of the middle phalanx of digits 2–5 | Flexion of wrist, and the metacarpophalangeal and proximal interphalangeal joints | Median n. (C8–T1) |
Flexor digitorum profundus | Medial surfaces of proximal ulna and interosseous membrane | Distal phalanges of digits 2–5 | Flexion of joints from wrist to distal interphalangeal joints | Medial part: ulnar n. (C8–T1) Lateral part: median n. (C8–T1) |
Flexor pollicis longus | Radius and interosseous membrane | Distal phalanx of digit 1 | Flexion of the thumb | Anterior interosseous n. from median n. (C7–C8) |
Pronator quadratus | Distal anterior ulna | Distal anterior radius | Pronation of elbow | |
Posterior forearm |
Anconeus | Lateral epicondyle of humerus | Olecranon process of the ulna | Extension of elbow | Radial n. (C6–C8) |
Brachioradialis | Lateral supracondylar ridge of humerus | Styloid process of the radius | Flexion of elbow | Radial n. (C5–C6) |
Extensor carpi radialis longus | | Metacarpal 2 | Extension and radial deviation of wrist | Radial n. (C6–C7) |
Extensor carpi radialis brevis | Lateral epicondyle of humerus | Metacarpals 2 and 3 | | Posterior interosseous n. (C7–C8), the continuation of deep branch of radial n. |
Extensor digitorum | | Dorsal digital expansion of digits 2–5 | Extension of wrist and digits | |
Extensor digiti minimi | | Dorsal digital expansion of digit 5 | Extension of digit 5 | |
Extensor carpi ulnaris | Lateral epicondyle of humerus and posterior ulna | Metacarpal 5 | Extension and ulnar deviation of wrist | |
Supinator | Lateral epicondyle and supinator crest of ulna | Lateral surface of radius | Supination of forearm | Posterior interosseous n. (C6–C7) |
Abductor pollicis longus | Ulna, radius, and interosseous membrane | Metacarpal 1 | Abduction of thumb | Posterior interosseous n. (C7–C8), the continuation of deep branch of radial n. |
Extensor pollicis brevis | Radius and interosseous membrane | Proximal phalanx of digit 1 | Extension of thumb at metacarpophalangeal and carpometacarpal joints | |
Extensor pollicis zlongus | Ulna and interosseous membrane | Distal phalanx of digit 1 | Extension of thumb | |
Extensor indicis | | Dorsal digital expansion of digit 2 | Extension of digit 2 | |