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Forearm Muscles (Anterior/Posterior)
Movements of wrist, hand, and fingers
17
Anatomy
Undergraduate 4
10/14/2010

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Term
Pronator Teres
Definition
(O)- medial epicondyle of humerus; coronoid process of ulna
(I)- lateral side of radius, midshaft
(N)- median nerve
(A)- pronates forearm and hand; assist of flexion of elbow joint
Term
Flexor carpi radialis
Definition
(O)- medial epicondyle of humerus
(I)- base of 2nd/3rd metacarpals
(N)- median nerve
(A)- powerful flexor of the wrist, abducts hand, assists with elbow flexion
Term
palmaris longus
Definition
(O)- medial epicondyle of humerus
(I)- palmar aponeurosis
(N)- median nerve
(A)- flexes the wrist, tensor of the palmar aponeurosis
Term
flexor carpi ulnaris
Definition
(O)- medial epicondyle of humerus, olecranon process and posterior surface of ulna
(I)- pisiform bone and base of 5th metacarpal
(N)- ulnar nerve
(A)- powerful flexor of the wrist, adducts hand, stabilizes wrist during finger extension
Term
flexor digitorum superficialis
Definition
(O)- medial epicondyle of humerus, coronois process of ulna, and shaft or radius
(I)- four tendons into middle phalanges of fingers 2-5
(N)- median nerve
(A)- flexes wrist and middle phalages of fingers 2-5
Term
flexor pollicis longus
Definition
(O)- anterior surface of radius and interosseous membrane
(I)- distal phalanx of thumb
(N)- median nerve
(A)- flexes distal phalanx of the thumb
Term
flexor digitorum profundus
Definition
(O)- coronoid process, anteromedial surface of ulna and interosseus membrane
(I)- 4 tendons into phalanges of fingers 2-5
(N)- medial half: ulnar, lateral half: median nerve
(A)- flexes distal phalanx of fingers 2-5, assists in wrist flexion
Term
pronator quadratus
Definition
(O)- distal portion of anterior shaft
(I)- distal surfae of anterior radius
(N)- median nerve
(A)- pronates forearm and hand
Term
extensor carpi radialis longus
Definition
(O)- lateral supercondlar ridge of humerus
(I)- base of 2nd metacarpal
(N)- radial nerve
(A)- extends and abducts hand
Term
extensor carpi radialis brevis
Definition
(O)- lateral epicondyle of humerus
(I)- base of 3rd metacarpal
(N)- radial nerve
(A)- extends and abducts hand
Term
extensor digitorum
Definition
(O)- lateral epicondyle of humerus
(I)- 4 tendons insert into extensor expansion hood and distal phalanges
(N)- radial nerve
(A)- finger extension and extends hand
Term
extensor digiti minimi
Definition
(O)- common extensor tendon
(I)- extensor expansion of 5th finger
(N)- radial nerve
(A)- extends the little finger and hand
Term
extensor carpi ulnaris
Definition
(O)- lateral epicondyle of humerus and post border of ulna
(I)- base of 5th metacarpal
(N)- radial nerve
(A)- extends and adducts hand
Term
supinator
Definition
(O)- lateral epicondyle of humerus, proximal ulna
(I)- lateral surface of the proximal end of radius
(N)- radial nerve
(A)- supinates forearm and hand
Term
abductor pollicis longus
Definition
(O)- posterior (proximal surface) of radius and ulna, interosseus membrane
(I)- base of 1st metacarpal
(N)- radial nerve
(A)- abducts and extends thumb
Term
extensor pollicis brevis/longus
Definition
(O)- dorsal shaft of radius (brevis) and ulna (longus)
(I)- base proximal phalanx (brev) and distal phalanx of thumb (long)
(N)- radial nerve
(A)- extends thumb
Term
extensor indicis
Definition
(O)- posterior surface of distal ulna; interosseous membrane
(I)- extensor expansion hood of index finger; joins tendon of extensor digitorum
(N)- radial nerve
(A)- extends index fingers
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