axial muscles

Epicranius (occipitofrontalis)

frontal belly of occipitofrontalis

raises eyebrows and scalp

epicranial aponeurosis

sheet connecting two bellies

occipital belly of occipitofrontalis

retracts scalp

orbicularis oculi

closes eyes

levator palpebrea superioris

opens eyes

Temporalis

elevates and retracts mandible

Masseter

elevates and protracts mandible

Digastric muscle

depresses the mandible

Buccinator

compresses cheek, limits space and holds food between cheeks

Orbicularis oris

Purse the lips to whistle or speak

zygomaticus major/minor

elevates corners of mouth( smile)

Depressor anguli oris

Depresses corners of mouth( frown)

Sternocleidomastoids

one muscle unilateral turns head to opposite side (both muscles) pull head downward

longissimus capitis

one musle turns head to same side( both muscles) extend neck

Diaphragm

External intercostals

elevates ribs during inspiration

internalcostals

depres ribes during forces expiration

External obliques

one side laterally flexes and rotates vertebral column( both sides) flexes vertebral column and compresses abdominal wall

internal obliques

one side laterally flexes vertebral column to oppisote iside side(both sides) compresses abdominal wall

transversus abdominis

one side laterally flexes vertebral column( both sides) flexes vertebral column and compress abdominal wall

rectus abdominis

flexes vertebral column and compresses abdominal wall

Serratus anterior

protracts( move anterior) the scapula and superioraly rotates scapula

trapezius

Elevates, retreacts, and depresses the scapula

Pectoralis major

flexion and adduction of arm and shoulder

latissimus dorsi

extension and adduction of arm and shoulder

Deltoid

abduction at the shoulder

teres major

extends and adducts at the shoulder and medially rotates

subscapularis

medially rotates arm at the shoulder

subraspinatus

abduction of arm at the shoulder

teres minor

adducts and laterally rotates at the shoulder

infraspinatus

adducts and laterally rotates at shoulder