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Muscle actions
Arms, hands, and fingers
| Term | Definition |
|---|---|
| Pectoralis major | adducting humerus medially rotating humerus shoulder flexion |
| Triceps brachii | elbow extension |
| Brachialis | elbow flexion |
| Supinator | supinates arm |
| Pronator quadratus | pronates hand |
| Pronator teres | pronates arm |
| Abductor pollicis longus | abducts thumb |
| Anconeus | assists in elbow flexion |
| Extensor indicis | extends index finger |
| Extensor pollicis longus and brevis | extends thumb |
| Extensor carpi ulnaris | extends wrists adducts wrists |
| Extensor carpi radialis longus and brevis | extends wrists |
| Extensor digitorum | extends fingers and wrists |
| Extensor digiti minimi | extends pinky (abducts pinky) |
| Brachioradialis | flexes elbow |
| Flexor digitorum profundus | flexes distal phalanges |
| Flexor carpi radialis and ulnaris | flexes wrists |
| Palmaris longus | flexes wrists |
| Flexor pollicus longus and brevis | flexes thumb |
| Adductor pollicis | adducts thumb |
| Opponens pollicis | opposes thumb to fingers |
| Abductor digiti minimi | abducts pinky |
| Flexor digiti minimi brevis | flexes pinky |
| Opponens digiti minimi | opposes pinky to thumb |
| Flexor digitorum superficialis | flexes fingers (middle and proximal phalanges) |
| Lumbricals | abducts fingers |
| Dorsal interossei | abducts fingers |