Craniofacial muscles

Question 1

Buccinator

Answer 1

attachments- from alveolar processes of the maxilla & mandible, pterygoid hamulus & pterygomandibular raphe to the *buccal angle

function- compresses cheek

innervation- facial n. (buccal branch)

blood supply- facial & buccal a.

Question 2

Depressor anguli oris

Answer 2

attachments- from mandible (anterior border) to buccal angle

function- depresses buccal angle laterally

innervation- facial n. (marginal mandibular & buccal branches)

blood supply- inferior labial & mental a.

Question 3

Depressor labii inferioris

Answer 3

attachments- from lower oblique line of mandible to skin & mucosa of lower lip

function- *draws lower lip downward

innervation- facial n. (marginal mandibular branch)

blood supply- inferior labial & mental a.

Question 4

Frontalis

Answer 4

attachments- from the superficial fascia of the eyebrows to the epicranial aponeurosis

function- protracts the scalp or elevates eyebrows & nose

innervation- facial n. (temporal branch)

blood supply- superficial temporal, supraorbital & supratrochlear a.

Question 5

Levator anguli oris

Answer 5

attachments- from canine fossa of maxilla to angle of mouth

function- raises angle of mouth

innervation- facial n. (buccal and zygomatic branches)

blood supply- facial, superior labial & infraorbital a.

Question 6

Levator labii superioris

Answer 6

attachments- from the infraorbital orbital margin to the lateral aspect of the upper lip

function- raises & everts upper lip

innervation- facial n. (buccal & zygomatic branches)

blood supply- facial, angular & infraorbital a.

Question 7

Mentalis muscle

Answer 7

attachments- from incisive fossa of mandible to skin of chin

function- *raises lower lip

innervation- facial n. (marginal mandibular branch)

blood supply- inferior labial & mental a.

Question 8

Nasalis muscle

Answer 8

attachments- from the maxilla lateral & inferior to the nasal notch to the bridge & ala of the nose

function- transverse fibers compress & alar fibers widen the nasal aperature.

innervation- facial n. (buccal branch)

blood supply- lateral nasal, angular & infraorbital a.

Question 9

Orbicularis oculi

Answer 9

attachments- from orbital margin, medial palpebral lig. & posterior lacrimal crest to superficial fascia of the eyelid

function- palpebral sphinchter

innervation- temporal & zygomatic branches of the facial n.

blood supply- superficial temporal, lacrimal, supraorbital, supratrochlear, dorsal nasal, angular, infraorbital & transverse facial a.

Question 10

Orbicularis oris

Answer 10

attachments- from the angle of the mouth to the superficial fascia of the upper lip

function- oral sphinchter

innervation- facial n. (buccal & marginal mandibular branches)

blood supply- facial, inferior & superior labial, infraorbital & mental a.

Question 11

Platysma

Answer 11

attachments- from the lower border of the mandible to the superficial fascia of the skin of the neck overlying the clavicle

function- *wrinkles the anterior nuccal (neck) skin

innervation- facial n. (cervical branch)

blood supply- facial, submental & suprascapular a.

Question 12

Zygomaticus major

Answer 12

attachments- from zygomatic bone to angle of the mouth

function- raises the buccal angle

innervation- facial n. (buccal & zygomatic branches)

blood supply- facial, superior labial, transverse facial & infraorbital a.