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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 |