anatomy unit 1 - posterior forearm attachments

brachioradialis proximal attachment

proximal 2/3 of lateral supra-epicondylar ridge of humerus

brachioradialis distal attachment

lateral surface of radius proximal to styloid process

extensor carpi radialis longus proximal attachment

lateral supra-epicondylar ridge of humerus

extensor carpi radialis longus distal attachment

dorsal aspect of base of 2nd metacarpal

extensor carpi radialis brevis proximal attachment

lateral epicondyle of humerus

extensor carpi radialis brevis distal attachment

dorsal aspect, base of 3rd metacarpal

extensor digitorum proximal attachment

lateral epicondyle of humerus

extensor digitorum distal attachment

extensor expansion of medial 4 digits

extensor digiti minimi proximal attachment

lateral epicondyle of humerus

extensor digiti minimi distal attachment

extensor expansion of 5th digit

extensor carpi ulnaris proximal attachment

lateral epicondyle of humerus

extensor carpi ulnaris distal attachment

dorsal aspect, base of 5th metacarpal

supinator proximal attachments

1. lateral epicondyle of humerus

2. posterior border of ulna

supinator distal attachment

lateral, posterior, anterior surface of proximal 1/3 of radius

abductor pollicis longus proximal attachment

posterior surface of proximal ½ of ulna and radius

abductor pollicis longus distal attachment

base of 1st metacarpal

extensor pollicis brevis proximal attachment

posterior surface of distal 1/3 of radius

extensor pollicis brevis distal attachment

dorsal aspect, base of proximal phalanx of thumb

extensor pollicis longus proximal attachment

posterior surface of middle 1/3 of ulna

extensor pollicis longus distal attachment

dorsal aspect of base of distal phalanx of thumb

extensor indicis proximal attachments

1. posterior surface of distal 1/3 of ulna

2. interosseous membrane

extensor indicis distal attachment

extensor expansion of 2nd digit