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Frontalis
superficial to frontal bone

Action of frontalis
raises the eyebrows/wrinkles the brow
Orbuclaris Oris
Muscles near the mouth

Action of Orbicularis Oculi
closes eye as in blinking
Zygomaticus
extends from cheekbones to corners of the mouth

Action of zygomaticus
raises lateral corners of the mouth when smiling
draws angle of mouth upward and laterally

Masseter

Action of masseter
elevataion and protusion the mandible
Temporalis

Action of temporalis
elevatation and retraction of the mandible
Sternocleidomastoid

Action of sternocleidomastoid
flexes and/or laterally rotates the head
Diaphragm

Action of diaphragm
inspiration - contracts to increase intra-abdominal pressure to force air into lungs
External oblique
fibers run down toward midline

Action of of external oblique
flex vertebral column, rotation if one side
Internal oblique
fibers run up toward midline

Action of internal oblique
flex vertebral column, rotation if one side
Rectus abdominis
fibers run up and down

Action of rectus abdominis
flex and rotate lumbar region
Pectoralis major
large chest muscle

Action of pectoralis major
flexes the humerus
extends the humorus
protracts and rotates scapula downward
Serratus anterior
"fingers"

Action of serratus anterior
rotates scapula upward
Trapezius
broad back muscle

Action of trapezius
stabilizes, elevates, retracts, and rotates scapula, extends head
Rhomboids (major and minor)

Action of rhomboids
stabilize scapula
Deltoid
shoulder muscle

Action of deltoid
shoulder abduction, flexion and extension
Latissimus dorsi
broad back muscle

Action of latissimus dorsi
Adducts, extends and internally rotates the arm when the insertion is moved towards the origin.
rotator of the trunk
Teres major

Action of teres major
extends, medially rotates, and adducts the arm
Infraspinatus
rotator cuff muscle

Action of infraspinatus
laterally rotates arm
Teres minor
rotator cuff muscle

Action of teres minor
laterally rotates arm
Triceps brachii
posterior brachial region

Action of triceps brachii
Extends forearm, long head extends, adducts arm, Extends shoulder
Biceps brachii
anterior brachial region

Action of biceps brachii
Flexes elbow
flexes and abducts shoulder
supinates radioulnar joint in the forearm
Brachialis
anterior brachial region

Action of brachialis
flexion at elbow joint
Brachioradials
anterior brachial region

Tensor fasciae latae

Action of tensor fasiae latae
stabilizes trunk
Sartorius

Action of sartorius
flexes, abducts, and laterally rotates thigh
Four heads of quadriceps femoris
-rectus femoris
-vastus lateralis
-vastus medialis
-vastus intermedius

Action of all four quadriceps femoris muscles
extend the leg
Rectus Femoris

Action of rectus femoris
knee extension; hip flexion
Vastus Lateralis

Action of vastus lateralis
Extends and stabilizes knee
Vastus Medialis

Action of vastus medialis
Extends leg
Gracilis

Action of gracilis
adducts thigh, flexes, and medially rotates leg
Three adductors
-brevis
-longus
-magnus

Action of adductors
adducts and medially rotates thigh
Gluteus maximus

Action of gluteus maximus
extends the thigh
Three posterior muscles grouped to make hamstrings
-biceps femoris
-semitendinosus
-semimembranosus

Action of the three hamstring muscles
extend the thigh and flex the leg at the knee
Biceps femoris

Semitendinosus

Semimembranousus

Tibialis anterior

Action of tibilais anterior
dorsiflexion
Extensor digitorum longus

Action of extensor digitorum longus
toe extension
Peroneus (fibularis) longus

Action of peroneus (fibularis) longus
plantar flexion and eversion
Gastrocnemius
large calf muscle

Action of gastrocnemius
plantar flexion
Soleus
deep to gastrocnemius

Action of soleus
plantar flexion
Orbicularis Oculi
maxillary and frontal bones

Action of Orbicularis Oris
closes lips, protrudes lips for kissing
Gluteus Medius
lateral surface of ilium

Action of Gluteus Medius
abducts and rotates thigh medially
Occipitalis
pulls scalp posteriorly

Buccinator
compresses cheek

Platysma
tenses skin of neck

splenius capitis
rotates head, bends head to one side, or extends neck

levator scapulae
elevates scapula

splenus capitis
back of neck

Spraspinatus

Transverse Absominis
compress abdominal contents

Pectineus
adducts, flexes, and medially rotates thigh

Psoas
loin

Iliacus
Flexes thigh on hip

abductor magnus
abducts thigh

flexor carpi radialis
flexes wrist and abducts hand

pronator teres
pronates forearm

palmaris longus
flexes wrist

extensor carpi radialis longus
Extends wrist and abducts hand
