Muscles and their Functions

41 terms by alb21286 

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zygomaticus major and minor

used in smiling

buccinator

used to suck in your cheeks

orbicularis oculi

used in blinking and squinting

depressor anguli oris

used to pout (pull the corners of mouth downwards)

epicranius (frontal belly)

raises eyebrows for a questioning expression

corrugator supercilii

used to form the vertical frown crease on your forehead

orbicularis oris

your "kisser"

masseter

prime mover to raise the mandible

platysma

tenses skin of the neck during shaving

rectus abdominus

a major spine flexor

latissimus dorsi

prime mover for arm extension

pectoralis major

prime mover for arm flexion

external oblique, internal oblique, transverse abdominus, rectus abdominus

assume major responsibility for forming the abdominal girdle

deltoid

prime mover of shoulder abduction

latissimus dorsi, pectoralis major

important in shoulder adduction; antagonists of the shoulder abductor

serratus anterior

moves the scapula forward and rotates scapula upwards

external intercostals

small, inspiratory muscles between the ribs; elevate the ribs

trapezius

extends the head

rhomboids

pull the scapula medially

biceps brachii

flexes the forearm and supinates the hand

supinator

synerhist for supination of hand

brachialis; brachioradialis

forearm flexors; no role in supination

triceps brachii

elbow extensor

flexor carpi radialis

power wrist flexor and abductor

flexor digitorum superficialis

flexes wrist and middle phalanges

pronator quadratus, 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

tenses skin of the palm

flexor hallucis longus

flexes the great toe and inverts the foot

fibularis brevis, fibularis longus

plantar flex and evert the foot

gluteus medius, tensor fasciae latae

abduct thigh to "at ease" stance

gluteus maximus

used to extens the hip when climbing stairs

gastrocnemius, soleus

prime movers of plantar flexion

tibialis posterior

prime mover of inversion of the foot

tibialis anterior

prime mover of dorsiflexion of the foot

adductor group

adduct the thigh as when standing at attention

extensor digitorum longus

extends the toes

biceps femoris, semimembranosus, semitendinosus

entend thigh and flex knee

rectus femoris

extends knee and flexes thigh

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