OIAS's of Facial Muscles

Buccinator

Origin: Mandible

Insertion: orbicularis oris

Risorius

Origin: fascia of masseter

Insertion: skin of mouth

Levator Labii superioris

Origin: zygomatic bone

Insertion: muscle of upper lip

Depressor Labii inferioris

Origin: body of mandible

Insertion: muscle of lower lip

Depressor anguli oris

Origin: body of mandible

Insertion: skin of mouth

Mentalis

Origin: mandible

Insertion: skin of chin

Nasalis

Origin: maxilla

Insertion: nasal cartilage

procerus

Origin: nasal bone

Insertion: skin of forehead

Corrugator supercili

Origin: arch of frontal bone

Insertion: skin of eyebrow

Auricularis anterior

Origin: galea aponeurotica

Insertion: cartilage of ear

Auricularis posterior

Origin: mastoid process

Insertion: posterior part of auricle

Frontalis

Origin: galea aponeurotica

Insertion: skin of eyebrows

Occipitalis

Origin: occipital bone

insertion: galea aponeurotica

Orbicularis oculi

Origin: frontal bone

Insertion: skin around eyes

Orbicularis oris

Origin: maxilla

Insertion: skin and muscle of mouth

Zygomaticus major

Origin: zygomatic bone

Insertion: skin and muscle at end of mouth

Zygomatic minor

Origin: zygomatic bone

Insertion: upper lip

Actions of Facial muscle

Buccinator

compresses cheek

Risorius

Draws corner of mouth

levator labii superioris

elevates upper lip

levator labii inferioris

depresses lower lip

depressor anguli oris

draws corners of mouth downward

mentalis

wrinkles chin

nasalis

flares nostrils

procerus

wrinkles bridge of nose

corrugator supercili

draws eyebrows medially

auricularis anterior

pulls ear foward

auricularis posterior

pulls ear backward

frontalis

raises eyebrow, wrinkles forehead

occipitalis

puls scalp posteriorly

orbicularis oculi

closes eyes

orbicularis oris

closes mouth

zygomaticus major

elevates corner of mouth

zygomaticus minor

elevates upper lip