Extensor carpi radialis brevis

A

Extensor digitorum

A

Extensor Carpi Radialis Longus

OIA

Origin:  Distal end of humerus

Insertion:  Base of Second Metacarpal

Action:  Extends wrist and abducts hand

Extensor Carpi Ulnaris

A

Flexor Carpi Radialis

OIA

Origin:  Medial Epicondyle of Humerus

Insertion:  Base of second and third metacarpals

Action:  Flexes wrist and abducts hand

Flexor Carpi Ulnaris

OIA

Origin:  Medial epicondyle of humerus and olecranon process

Insertion:  Carpal and metacarpal bones

Action:  Flexes wrist and adducts hand