muscles and functions

frontalis

raises eyebrow

procerus

wrinkles skin covering bridge of nose

nasalis

compresses nostrils

orbicularis oculi

closes eyelids

levator labii superioris

elevates and everts upper lip

platysma

depresses mandible

zygomaticus

elevates upper lip

buccinator

compresses cheeks

depressor anguli oris

depresses angle of mouth

mentalis

elevates and protrudes the upper lip

temporalis

tightens scalp

masseter

elevates mandible

pterygoid

laterally moves and protects mandible

sternocleidomastoid

rotates head

scalene muscles

plays role in movement of neck

geniohyoid

elevates hyoid bone

mylohyoid

elevates floor of mouth

stylohyoid

elevates hyoid bone

omohyoid

depresses hyoid bone

thyrohyoid

depresses hyoid bone

sternothyroid

depresses larynx

sternohyoid

depresses hyoid bone

omohyoid

depresses hyoid bone

external intercostal

provides structural support to intercostal spaces

internal intercostal

depresses ribs

diaphragm

primary muscle of inspiration

rectus abdominis

flexes trunk

linea alba

maintain abdominal muscles at certain proximity to each other

external oblique

rotates trunk

internal oblique

flexes and rotates with trunk

transversus abdominis

compresses and provides structural support to adjacent abdominal structures

splenius muscles

rotates and extends head

erector spinae muscles

straightening vertebral column

pectoralis major

depresses pectoral girdle at acromioclavicular and sternoclavicular joints

pectoralis minor

protracts and downwardly rotates pectoral girdle at acromioclavicular joint

serratus anterior

protracts and upwardly rotates shoulder girdle

trapezius

upwardly rotates pectoral girdle

latissimus dorsi

extends arm at glenohumeral joint

deltoid

medially and laterally rotates arm at glenohumeral joint

rhomboideus

downwardly rotates pectoral girdle

supraspinatus

stabilizes arm at glenohumeral joint

infraspinatus

stabilizes arm at glenohumeral joint

sternomastoid

rotates head

superior oblique

medially rotates eyeball

superior rectus

medially rotates eyeball

lateral rectus

abducts eyeball

medial rectus

adducts eyeball

inferior oblique

laterally rotates eyeball

inferior rectus

lateraly rotates eyeball

biceps brachii

flexes forearm at elbow joint

triceps brachii

extends forearm at elbow joint

brachialis

flexes forearm at elbow joint

flexor carpi radialis

flexes hand at wrist joint

extensor carpi radialis

extends hand at wrist joint

pronator teres

pronates forearm at radioulnar joint

flexor carpi ulnaris

flexes hand at radiocarpal joint

extensor carpi ulnaris

medial aspect of base of fifth metacarpal bone

extensor digitorium

extends index, middle, ring and little fingers

anconeus

extends forearn at elbow joint

gluteus maximus

abducts thigh at hip joint

gluteus medius

medially rotates thigh and hip joint

gluteus minimus

abducts thigh at hip joint

tensor fascia latae

abduction of thigh at hip joint

piriformes

lateraly rotates thigh and hip joint

obturator internus

transversely abducts thigh at hip joint

psoas major

flexes thigh at hip joint

rectus femoris

extends leg at knee joint

vastus lateralis

extends leg at knee joint

vastus medialis

extends leg at knee joint

vastus intermedius

extends leg at knee joint

sartorius

medially rotates leg at knee joint

pectineus

flexes thigh at hip joint

adductor longus

adducts thigh at hip joint

gracilis

assists in adduction of thigh at hip joint

adductor magnus

adducts thigh at hip joint

biceps femoris

extends thigh at hip joint

obturator externus

lateraly rotates thigh at hip joint

semitendinosus

medially rotates leg at knee joint

semimembranosus

medially rotates leg at knee joint

tibialis anterior

dorsiflexes foot at ankle joint

extensor digitorium

extends toes

fibularis

assits in plantarflexion of foot at ankle joint

gastrocnemius

plantarflexes foot at ankle joint

soleus

plantarflexes foot at ankle joint

plantaris

assits in plantaflexion of foot at ankle joint

popliteus

unlocks knee joint at beginning of knee flexion

tibialis posterior

plantarflexes foot at ankle joint

flexor digitorium longus

flexes second, third, fourth and little toes