Antebrachial Muscle OIAs

Brachioradialis (Origin)

Proximal part of lateral supracondylar ridge of humerus

Brachioradialis (Insertion)

Styloid process of radius

Brachioradialis (Action)

Flexes elbow

Extensor carpi radialis longus (Origin)

Distal part of lateral supracondylar ridge of humerus

Extensor carpi radialis longus (Insertion)

Base of 2nd metacarpal

Extensor carpi radialis longus (Action)

Extends wrist, Abducts wrist

Extensor carpi radialis brevis (Origin)

Lateral epicondyle of humerus

Extensor carpi radialis brevis (Insertion)

Base of 2nd & 3rd metacarpal

Extensor carpi radialis brevis (Action)

Extends wrist, Abducts wrist

Extensor carpi ulnaris (Origin)

Lateral epicondyle of humerus, posterior border of ulna

Extensor carpi ulnaris (Insertion)

Base of 5th metacarpal

Extensor carpi ulnaris (Action)

Extends wrist, Adducts wrist

Extensor digiti minimi (Origin)

Lateral epicondyle of humerus

Extensor digiti minimi (Insertion)

Extensor expansion of 5th digit

Extensor digiti minimi (Action)

Extends 5th digit

Extensor digitorum (Origin)

Lateral epicondyle of humerus

Extensor digitorum (Insertion)

Extensor expansions of digits 2-5

Extensor digitorum (Action)

Extends digits 2-5, Extends wrist

Abductor pollicis longus (Origin)

Proximal posterior surface of ulna and radius, Interosseous membrane

Abductor pollicis longus (Insertion)

Base of 1st metacarpal

Abductor pollicis longus (Action)

Abducts thumb, Extends thumb

Extensor pollicis longus (Origin)

Middle posterior surface of ulna, Interosseous membrane

Extensor pollicis longus (Insertion)

Dorsal base of distal phalanx of thumb

Extensor pollicis longus (Action)

Extends distal phalanx of thumb

Extensor indicis (Origin)

Distal posterior surface of ulna, Interosseous membrane

Extensor indicis (Insertion)

Extensor expansion of 2nd digit

Extensor indicis (Action)

Extends 2nd digit, Extends wrist

Extensor pollicis brevis (Origin)

Distal posterior surface of radius, Interosseous membrane

Extensor pollicis brevis (Insertion)

Dorsal base of proximal phalanx of thumb

Extensor pollicis brevis (Action)

Extends proximal phalanx of thumb

Supinator (Origin)

Lateral epicondyle of humerus, Supinator fossa of ulna, Supinator crest of ulna

Supinator (Insertion)

Proximal lateral, posterior, and anterior surfaces of radius

Supinator (Action)

Supinates elbow

Flexor carpi radialis (Origin)

Medial epicondyle of humerus

Flexor carpi radialis (Insertion)

Anterior base of 2nd metacarpal

Flexor carpi radialis (Action)

Flexes wrist, Abducts wrist

Pronator Teres (Origin)

Medial epicondyle of humerus, Coronoid process of ulna

Pronator Teres (Insertion)

Middle lateral radius

Pronator Teres (Action)

Pronates elbow, Flexes elbow

Palmaris longus (Origin)

Medial epicondyle of humerus

Palmaris longus (Insertion)

Distal flexor retinaculum, Palmar aponeurosis

Palmaris longus (Action)

Flexes wrist

Flexor digitorum superficialis (Origin)

Medial epicondyle of humerus, Coronoid process of ulna, Anterior surface of the proximal radius

Flexor digitorum superficialis (Insertion)

Bodies of middle phalanges of digits 2-5

Flexor digitorum superficialis (Action)

Flexes middle and proximal phalanges of digits 2-5, Flexes wrist

Flexor carpi ulnaris (Origin)

Medial epicondyle of humerus, Olecronon process, Posterior ulna

Flexor carpi ulnaris (Insertion)

Pisiform bone, Hook of hamate, Base of 5th metacarpal

Flexor carpi ulnaris (Action)

Flexes wrist, Adducts wrist

Flexor Pollicis Longus (Origin)

Middle anterior surface of radius, Interosseous membrane

Flexor Pollicis Longus (Insertion)

Palmar base of distal phalanx of thumb

Flexor Pollicis Longus (Action)

Flexes thumb

Flexor digitorum profundus (Origin)

Proximal medial and anterior surface of ulna, Interosseous membrane

Flexor digitorum profundus (Insertion)

Palmar base of distal phalanges of digits 2-5

Flexor digitorum profundus (Action)

Flexes distal phalanges of digits 2-5, Flexes wrist

Pronator quadratus (Origin)

Distal anterior ulna

Pronator quadratus (Insertion)

Distal anterior radius

Pronator quadratus (Action)

Pronates elbow