Skeletal Muscles Updated Review

frontalis

raises eyebrows

orbicularis oculi

closes the eye

temporalis

closes jaw

masseter

closes the jaw

orbicularis oris

closes lips

zygomaticus

raises the corner of the mouth

sternocleidomastoid

one side contraction: laterally flexes neck, rotates head to opposite side;

both sides together: flexes neck forward

trapezius

extends or straightens and hyperextends the neck. Also elevates the shoulders

pectoralis major

flexes, adducts, and rotates the shoulder medially

serratus anterior muscle

accessory respiratory muscle; raises ribcage

external oblique

laterally flexes and rotates vertebral column (superficial)

rectus abdominis

abdominal muscle that flexes vertebral column (superficial)

internal oblique muscle

rotates the vertebral column (intermediate)

deltoid

abduct, flex, extend and rotate the arm

triceps brachii

extends forearm at the elbow

erector spinae

extends the vertebral column

latissimus dorsi

extends, adducts, and medially rotates the shoulder

gluteus medius

abducts and medially rotates thigh

gluteus maximus

extends thigh and back at the waist

biceps brachii

flexes the forearm

brachioradialis

flexes and supinates the forearm at the elbow

gracilis

adducts the thigh and flexes the leg

sartorius muscle

diagonally crosses the anterior thigh to attach medially to the tibia

quadriceps

extend the leg or knee

tibialis anterior

dorsiflexion and inversion of foot

soleus muscle

plantar flexes the ankle

gastrocnemius

plantarflexes ankle

hamstring

flexes leg at the knee and extends thigh

flexor carpi radialis

flexes and abducts the wrist

extensor carpi radialis

wrist extensors

extensor digitorum

extends the fingers

brachioradialis

flexes forearm

flexor digitorum superficialis

flexes wrist and fingers 2-5

levator scapulae

raises the scapula

trapezius

muscle involved in shrugging the shoulder

zygomaticus

muscle involved in smiling

temporalis and masseter

two muscles that close the jaw

pectoralis major

involved in raising arm forward

gastrocnemius and soleus

two muscles that allows standing on tip toes

rectus abdominis, external obliques, internal obliques, transverse abdominis

four abdominal muscles

sartorius muscle

weak hip flexor and laterally rotates thigh

rectus femoris, vastas medialis, vastas latralis

muscles of the quadracep

bicep femoris, semitendinosis, semimembranosis

muscles of the hamstring

extensor digitorum longus

dorsiflexes toes and foot

lattissimus dorsi

muscle used to scratch your back

orbicularis oculi

muscle in volved in winking

buccinator

muscle for sucking in your cheek

orbicularis oris

muscle for puckering the lips

deltoid

abductor of the shoulder

platysma

superficial muscles of the front of the neck