Muscles And Functions

Front 1

Raises eyebrows, wrinkles forehead

Back 1

Frontalis

Front 2

Compress cheeks

Back 2

Buccinator

Front 3

Elevates mandible

Back 3

masseter

Front 4

compresses, purses lips

Back 4

orbicularis oris

Front 5

Closes eye

Back 5

orbicularis oculi

Front 6

Flex neck, Bends head toward shoulder and turns face to opposite side

Back 6

sternocleidomastoid

Front 7

Draws corner of mouth back and up

Back 7

Zygomaticus

Front 8

occipitalis

Back 8

tenses and retracts scalp

Front 9

external intercostals

Back 9

Elevate ribs

Front 10

Internal intercostals

Back 10

depress ribs

Front 11

diaphragm

Back 11

contraction expands thoracic cavity, compresses abdominopelvic cavity

Front 12

external oblique

Back 12

compresses abdomen, depresses ribs, flexes or laterally flexes vertebral column

Front 13

rectus abdominis

Back 13

depresses ribs, flexes vertebral column

Front 14

trapezius

Back 14

elevate clavicle, elevate scapula, hyperextend neck

Front 15

levator scapulae

Back 15

elevates scapula

Front 16

pectoralis minor

Back 16

depresses shoulder, rotates scapula downward, elevates ribs if scapula is stationary

Front 17

deltoid

Back 17

abduction at shoulder

Front 18

latissumus dorsi

Back 18

extension, adduction and medial rotation at shoulder

Front 19

pectoralis major

Back 19

flexion, adduction and rotation at shoulder

Front 20

biceps brachii

Back 20

flexion at elbow and shoulder

Front 21

triceps brachii

Back 21

extension at elbow

Front 22

flexor carpi radialis

Back 22

flexion and abduction at wrist

Front 23

extensor carpi ulnaris

Back 23

flexion and abduction at wrist

Front 24

extensor digitorum

Back 24

extension at finger joints and wrist

Front 25

flexor digitorum

Back 25

flexion at finger joints and wrist

Front 26

gluteus maximus

Back 26

extension and lateral rotation at hip

Front 27

gracilis

Back 27

flexion at knee, adduction and medial rotation at hip

Front 28

biceps femoris

Back 28

flexion at knee

Front 29

semimembranous

Back 29

flexion at knee; flexion and medial rotation at hip

Front 30

sartorius

Back 30

flexion at knee; flexion and lateral rotation at hip

Front 31

popliteus

Back 31

rotates tibia medially

Front 32

rectus femoris

Back 32

extension at knee, flexion at hip

Front 33

tibialis anterior

Back 33

dorsiflexion at ankle; inversion of foot

Front 34

gastronemius

Back 34

plantar flexion at ankle, inversion of foot

Front 35

soleus

Back 35

plantar flexion at ankle; adduction of foot

Front 36

flexor hallucis

Back 36

flexion at joints of big toe

Front 37

temporalis

Back 37

skull- elevates mandible

Front 38

brachialis

Back 38

flexion at elbow

Front 39

extensor carpi radialis

Back 39

extension and abduction at wrist

Front 40

gluteus medius

Back 40

abduction and medial rotation at hip

Front 41

palmeris longus

Back 41

flexion at wrist

Front 42

fibularis

Back 42

eversion of foot

Front 43

adductor longus

Back 43

adduction, flexion and medial rotation at hip

Front 44

flexor carpi ulnaris

Back 44

flexion and adduction at wrist

Front 45

teres minor

Back 45

lateral rotation at shoulder

Front 46

teres major

Back 46

adduction and medial rotation at shoulder

Front 47

rhomboideus major

Back 47

adduction and rotates scapula laterally

Front 48

digastric

Back 48

depresses mandible or elevates larynx

Front 49

mylohyoid

Back 49

elevates floor of mouth and hyoid and depresses mandible