OT 503 - Unit 2 muscles and movements

Frontalis

wrinkles forehead and raises eyebrows

Occipitalis

draws scalp backwards

Orbicularis oris

closes and protrudes lips/puckers for kiss

Buccinator

presses cheek against teeth/compresses distended cheeks/directs bolus food

Levator labii superioris alaeque nasi

raises upper lip/opens nostril/expresses disgust

Levator labii superioris

raises upper lip/snarl

Levator anguli oris

raises corner of mouth/smile/unilateral smirk

Depressor anguli oris

draws corners of mouth downwards

Depressor labii inferioris

draws lower lip downwards

Zygomaticus major

draws corner of mouth upward

Zygomaticus minor

draws upper lip upward

Mentalis

raises and protrudes lower lip

Risorius

retracts corner of the mouth

Orbicularis oculi

closes the eye

Nasilis transverse part

compresses nasal aperture

Nasalis alar part

dilates nostrils

Procerus

draws down medial angle of eyebrows

Depressor sept nasi

pulls nose down

Auricularis

move ears

Corrugator supercilli

draws eyebrow medially and downward

Platysma

draw corners of mouth downward

Temporalis

elevate and retract mandible

Masseter

elevation of mandible

Lateral pterygoid

protrusion and side to side movements of mandible

Medial pterygoid

elevation and protrusion and side to side movements of mandible

Extrinsic tongue

moves tongue as a whole (up or down in mouth)

Intrinsic tongue

alter shape of the tongue (flat vs point)