A & P I Muscle Quiz

occipitofrontalis (frontal belly)

wrinkles forehead

orbicularis oris

closes lip

depressor labli inferioris

lowers lower lip

platysma

depresses mandible

orbicularis oculi

closes eye

temporalis

elevates mandible

sternocleidomastoid

turns head from side to side

rectus abdominis

flexes vertebral column

external obliques

compresses abdomen

serratus anterior

rotates scapula laterally

trapezius

extends the head

pectoralis major

adducts arm

latissimus dorsi

draws shoulder downward and backwards

deltoid

abducts arm

biceps brachii

flexes forearm

triceps brachii

extends forearm

pronator teres

pronates forearm

extensor carpi radialis longus

extends wrist

flexor carpi radialis

flexes wrist

extensor digitorum

extends phalanges

gluteus maximus

extends thigh

tensor fasciae lata

flexes thigh

adductor longus

adducts thigh

quadriceps: rectus femoris, vastus lateralis, vastus medialis, vastus intermedius

extends leg

hamstrings: biceps femoris, semitendinosus, semimembranosus

flexes leg

sartorius

assists in crossing the legs

gastrocnemius

plantarflexes foot

fibularis longus

everts foot

tibialis anterior

inverts foot