Info

Muscle

Origin

Insertion

Action

Nerve Supply

Flexor carpi radialis

Medial epicondyle of humerus

Base of second and third metacarpals

Flexes and abducts hand at the wrist

Median n.

Flexor carpi ulnaris

Medial epicondyle of humerus and olecranon process

Carpal and metacarpal bones

Flexes and adducts hand at the wrist

Ulnar n.

Palmaris longus

Medial epicondyle of humerus

Fascia of palm

Flexes hand at the wrist

Median n.

Flexor digitorum profundus

Anterior surface of ulna

Bases of distal phalanges in fingers 2-5

Flexes distal joints of fingers

Median and ulnar nerves

Flexor digitorum superficialis

Medial epicondyle of humerus, coronoid process of ulna, and radius

Tendons of fingers

Flexes fingers and hand

Median n.

Extensor carpi radialis longus

Distal end of humerus

Base of second metacarpal

Extends and abducts hand at the wrist

Radial n.

Extensor carpi radialis brevis

Lateral epicondyle of humerus

Base of second and third metacarpals

Extends and abducts hand at the wrist

Radial n.

Extensor carpi ulnaris

Lateral epicondyle of humerus

Base of fifth metacarpal

Extends and adducts hand at the wrist

Radial n.

Extensor digitorum

Lateral epicondyle of humerus

Posterior surface of phalanges in fingers 2-5

Extends fingers

Radial n.

flexes the fingers and, by a combined action, flexes the hand at the wrist (fig. 9.30).

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