Muscles promoting facial expressions

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Muscles Promoting Facial Expressions

10/17/2012

ORIGIN: epicranial aponeurosis

(tendinous sheet)

INSERTION: skin of eyebrows;

root of nose

Muscles Promoting Facial Expressions

Frontalis

(Epicranius)

ACTION: raises eyebrows; wrinkles forehead

(Anterior view)

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10/17/2012

Muscles Promoting Facial Expressions

ORIGIN: occipital bone; temporal bone

Occipitalis

(Epicranius)

INSERTION: epicranial aponeurosis

(tendinous sheet)

ACTION: pulls scalp posteriorly

(Posterior view)

ORIGIN: frontal / maxillary bone; ligaments around orbit

INSERTION: tissue of eyelid

Muscles Promoting Facial Expressions

Orbicularis oculi

ACTION: closes eye

(Anterior view)

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10/17/2012

ORIGIN: zygomatic bone

INSERTION: skin at corner of mouth

Muscles Promoting Facial Expressions

Zygomaticus

(major / minor)

ACTION: raises corner of mouth upwards

(`smiling')

(Anterior view)

Muscles Promoting Facial Expressions

Risorius

ORIGIN: fascia of masseter muscle

INSERTION: skin at corner of mouth

ACTION: draws corner of lips laterally

(Anterior view)

3

Muscles Promoting Facial Expressions

Levator labii superioris

ORIGIN: zygomatic bone; orbit of eye

INSERTION: skin of upper lip

ACTION: opens lips

10/17/2012

(Anterior view)

Muscles Promoting Facial Expressions

Depressor labii inferioris

ORIGIN: body of mandible

INSERTION: skin of lower lip

ACTION: draws lower lip inferiorly

(`pout')

(Anterior view)

4

10/17/2012

Muscles Promoting Facial Expressions

Depressor anguli oris

ORIGIN: body of mandible

INSERTION: skin at corner of mouth

ACTION: draws corner of mouth downward

(`frowning')

(Anterior view)

ORIGIN: maxilla / mandible

INSERTION: skin / muscles at angle

of mouth

Muscles Promoting Facial Expressions

Orbicularis oris

ACTION: closes lips; purses lips

(`kissing / whistling')

(Anterior view)

5

ORIGIN: mandible

INSERTION: skin of chin

Muscles Promoting Facial Expressions

Mentalis

ACTION: wrinkles chin

10/17/2012

(Anterior view)

ORIGIN: maxilla / mandible

INSERTION: orbicularis oris muscle

Muscles Promoting Facial Expressions

Buccinator

ACTION: compress cheeks

(`sucking')

(Lateral view)

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