click below
click below
Normal Size Small Size show me how
Arm/Hand Muscle
Muscle Actions
Term | Definition |
---|---|
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 |