Download Muscle Chart: Superficial Posterior Forearm

Superficial Muscles of the Posterior (Extensor) Forearm MUSCLE NERVE ORIGIN(S) INSERTION(S) ACTION(S) Brachioradialis Radial Lateral epicondyle of Humerus Distal shaft of radius Flexion of elbow pronation from supination supination from pronation Extensor carpi radialis longus Radial Lateral epicondyle of Humerus Dorsum of base of 2nd metacarpal Extension and abduction of wrist Extensor carpi radialis brevis Radial (Deep) Lateral epicondyle of Humerus Dorsum of base of 3rd metacarpal Extension and abduction of wrist Extensor digitorum Radial (Deep) Lateral epicondyle of Humerus Extensor hoods and proximal phalanges of ulnar 4 digits Extension of metacarpophalangeal joints (and wrist) Extensor digiti minimi Radial (Deep) Ulnar aspect of extensor digitorum Extensor hood and proximal Extension of fifth phalanx of fifth digit metacarpophalangeal joint, (and wrist) Extensor carpi ulnaris Radial (Deep) Lateral epicondyle of Humerus and posterior border of ulna Dorsum of base of 5th metacarpal Extension and adduction of wrist