KAAP309 - Head and Axial Muscles

upper trapezius

middle trapezius

lower trapezius

rhomboid major

rhomboid minor

iliocostalis

longissimus

quadratus lumborum

serratus anterior

external intercostals

internal intercostals

diaphragm

rectus abdominis

external oblique

internal oblique

transverse abdominis

occipitofrontalis

occipitofrontalis action

elevation of eyebrows, creases skin on forehead, moves scalp backward and forward

orbicularis oculi

orbicularis oculi action

close eyelids (blink/wink)

orbicularis oris

orbicularis oris action

closes lips and protrudes lips

zygomaticus major

zygomaticus major action

elevation of corner of mouth

buccinator

buccinator action

compression of cheek

masseter

masseter action

elevation of mandible and protraction of mandible

temporalis

temporalis action

elevation of mandible and retraction of mandible

levator labii superioris

levator labii superioris action

elevation of upper lip

depressor labii inferioris

depressor labii inferioris action

depression of lower lip

mentalis

mentalis action

wrinkles skin of chine and raises and protrudes lower lip

platysma

platysma action

elevates and creases skin of neck and depression of lower lip and angle of mouth

mylohyoid

mylohyoid action

elevation of floor of mouth

sternohyoid

sternohyoid action

depression of hyoid bone

omohyoid

omohyoid action

depression of hyoid bone

thyrohyoid

thyrohyoid action

elevation of larynx and depression of hyoid bone

sternothyroid

sternothyroid action

depression of larynx

sternocleidomastoid

sternocleidomastoid action

unilateral: rotation of head so face turns to opposite side

bilateral: flexion of neck

bilateral: extension of head

scalene

scalene action

anterior: elevation of rib 1; lateral flexion and rotation of neck

middle: elevation of rib 1; lateral flexion of neck

posterior: elevation of rib 2; lateral flexion of neck