Exam 3 - Functions

Occipitofrontalis frontal belly

raises eyebrows

orbicularis oris

closes and protrudes lips

zygomaticus major

draws angle of the mouth superiorly and laterally

zygomaticus minor

elevates upper lip

depressor anguli oris

draws angle of the mouth laterally and inferiorly

buccinator

presses cheeks against teeth and lips

risorius

draws angle of the mouth laterally

orbicularis oculi

closes eye

masseter

elevates mandible

temporalis

elevates and retracts mandible

omohyoid

depresses hyoid bone

sternohyoid

depresses hyoid bone

sternocleidomastoid

laterally flex and rotate head

rectus abdominus

compresses abdomen

external oblique

compresses abdomen

internal oblique

compresses abdomen

transversus abdominis

compresses abdomen

diaphragm

causes inhalation

external intercostal

inhalation

internal intercostal

forced exhalation

pectoralis minor

abducts scapula and rotates it downward

serratus anterior

horizontal movement of arm

trapezius

extends head

levator scapula

elevates scapula

rhomboid major

elevates and adducts scapula

rhomboid minor

elevates and adducts scapula

pectoralis major

adducts and medially rotates arm

latissimus dorsi

draws arm inferiorly and posteriorly

deltoid

abducts arm

supraspinatus

assists deltoid in abducting arm

teres major

adducts, extends and medially rotates arm

teres minor

adducts, extends and laterally rotates arm

biceps brachii

flexes forearm

bracialis

flexes forearm

brachioradialis

flexes forearm, supinates and pronates forearm to neutral position

triceps brachii

extends forearm

pronator teres

pronates forearm

flexor carpi radialis

flexes and abducts hand

palmaris longus

flexes hand

flexor carpi ulnaris

flexes and adducts hand

flexor digitorum superficialis

flexes proximal and middle phalanx

flexor digitorum profundus

flexes distal and middle phalanx

extensor carpi radialis longus

extends and abducts hand

extensor carpi radialis brevis

extends and abducts hand

extensor digitorum

extends fingers and hand

extensor digiti minimi

extends proximal phalanx of little finger

extensor carpi ulnaris

extends and adducts hand

abductor pollicis longus

abducts and extends thumb

extensor pollicis brevis

extends proximal phalanx of thumb

extensor pollicis longus

extends distal phalanx of thumb

gluteus maximus

extends and laterally rotates thigh

gluteus medius

abducts and medially rotates thigh

tensor facia latae

flexes and abducts thigh

adductor longus

adducts and flexes thigh

adductor magnus

adducts and medially rotates thigh

pectineus

flexes and adducts thigh

rectus femoris

extends leg

vastus lateralis

extends leg

vastus medialis

extends leg

vastus intermidius

extends leg

sartorius

abducts and laterally rotates thigh

biceps femoris

flexes leg

semitendinosis

flexes leg

semimembranosis

flexes leg

tibialis anterior

dorsiflexes foot

extensor digitorum longus

dorsiflexes foot, extends toes

fibularis longus

plantar flexes foot

gastrocnemius

plantar flexes foot

soleus

plantar flexes foot