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Biceps brachii

Flexes the forearm and supinates the hand


Synergist for supinating the hand


Forearm flexor; no role in supination


Forearm flexor; no role in supination

Triceps brachii

Elbow extensor

Flexor carpi radialis

Power wrist flexor and abductor

Flexor digitorum superficialis

Flexes the wrist and middle phalanges

Pronator quadratus

Pronates the hand

Pronator teres

Pronates the hand

Flexor pollicis longus

Flexes the thumb

Extensor carpi radialis longus

Extends and abducts the wrist

Extensor digitorum

Extends the wrist and digits

Palmaris longus

Flat muscle that is a weak wrist flexor; tenses skin of palm.

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