Muscles that Move the Hand

Movements of the hand include movements of the wrist and fingers. Many muscles move the wrist, hand, and fingers. They originate from the distal end of the humerus and from the radius and ulna. The two major groups of these muscles are flexors on the anterior side of the forearm and extensors on the posterior side. Figures 9.30, 9.31, 9.32, reference plate 65, and table 9.9 concern these muscles. The muscles that move the hand include the following:

Flexors

Flexor carpi radialis longus Flexor carpi ulnaris Palmaris longus Flexor digitorum profundus Flexor digitorum superficialis

Extensors

Extensor carpi radialis Extensor carpi radialis brevis Extensor carpi ulnaris Extensor digitorum

Biceps brachii Brachialis

Supinator Pronator teres Brachioradialis

Extensor carpi radialis longus

Flexor carpi radialis

Palmaris longus

Flexor carpi ulnaris

Pronator quadratus

Flexor Polaris Longus
Flexor digitorum superficialis

Brachioradialis

Brachioradialis

Muscles That Move The HandBlood Vessels And Muscles

Triceps brachii

Flexor carpi ulnaris Extensor carpi ulnaris

Extensor carpi radialis longus and brevis

Brachioradialis

Extensor carpi radialis longus

Extensor carpi radialis brevis

Extensor digitorum

Triceps brachii

Flexor carpi ulnaris Extensor carpi ulnaris

Extensor Carpi Radialis Longus

Extensor carpi radialis longus and brevis

Brachioradialis

Extensor carpi radialis longus

Extensor carpi radialis brevis

Extensor digitorum

Extensor digitorum

Extensor digitorum

Epicondylus Lateralis

Figure 9.31

(a) Muscles of the posterior forearm. (b and c) Isolated views of muscles associated with the posterior forearm.

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