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Arm/Hand Muscle

Muscle Actions

TermDefinition
deltoid anterior fibers: flex and medially rotate arm. middle fibers: prime mover of abduction. posterior fibers: extend and laterally rotate arm.
teres major extends, adducts, and medially rotates arm.
biceps brachii flexes arm
brachioradilis flexes forearm
brachialis primary flexor of forearm
triceps brachii extends and adducts arm
extensor digitorum IP joint extension
supinator supinates forearm
pronator teres pronates forearm
extensor carpi ulnaris extends wrist, adducts hand
flexor carpi radialis flexes wrist and abducts hand
extensor pollicis brevis extends MP joint of thumb; extends wrist
abductor pollicis longus abducts thumb; extends wrist
abductor pollicis brevis abducts thumb
flexor pollicis brevis flexes thumb
Created by: ahasenmu
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