KD 02 - Facial Muscles

7/27/2019 KD 02 - Facial Muscles

1/3

Muscle Origin Insertion Innervation Function

Orbital

Group

Orbicularis

oculi

Palpebral part- Medialpalpebral ligament; Orbital

part- Nasal part of frontal

bone, frontal process of

maxilla, medial palpebral

ligament

Palpebral part- Lateral

palpebral raphe; Orbital part-

Fibers form an uninterrupted

ellipse around orbit

Facial Nerve

(VII)

Closes the eyelid gently or

forcefully

Corrugator

supercilli

Medial end of the superciliary

arch

Skin on the medial half of

eyebrow

Facial Nerve

(VII)

Draws the eyebrows medially

and downward

Nasal

Group

Nasalis

Transverse part- Maxilla just

lateral to nose; Alar part-

Maxilla over lateral incisor

Transverse part- Aponeurosis

across dorsum of nose with

muscle fibers from the other

side; Alar part- Alar cartilage

of nose

Facial Nerve

(VII)

Compresses nasal aperture;

Draws cartilage downward

and laterally opens nostril

ProcerusNasal bone and upper part of

lateral nasal cartilage

Skin of lower forehead

between eyebrows

Facial Nerve

(VII)

Draws down medial angle of

eyebrows producing

transverse wrinkles over

bridge of nose

Depressorsepti Maxilla above medial incisor Mobile part of the nasalseptum Facial Nerve(VII) Pulls nose inferiorly

Oral Group

Depressor

anguli oris

Oblique line of mandible

below canine, premolar and

first molar teeth

Skin at the corner of mouth

and blending with orbicularis

oris

Facial Nerve

(VII)

Draws corner of mouth down

and laterally

Depressor

labii

inferioris

Anterior part of oblique line of

mandible

Lower lip at midline, blends

with muscle from opposite

side

Facial Nerve

(VII)

Draws lower lip downward

and laterally


2/3

MentalisMandible inferior to incisor

teethSkin of chin

Facial Nerve

(VII)

Raises and protrudes lower lip

as it wrinkles skin on chin

Risorius Fascia over masseter muscle Skin at the corner of mouthFacial Nerve

(VII)Retracts corner of mouth

Zygomaticu

s major

Posterior part of lateral

surface of zygomatic boneSkin at the corner of mouth

Facial Nerve

(VII)

Draws the corner of the

mouth upward and laterally

Zygomaticu

s minor

Anterior part of lateral surface

of zygomatic bone

Upper lip just medial to

corner of mouth

Facial Nerve

(VII)Draws the upper lip upward

Levator

labii

superioris

Infra-orbital margin of maxillaSkin of upper lateral half of

upper lip

Facial Nerve

(VII)

Raises upper lip, helps form

nasolabial furrow

Levator

labii

superiorisalaeque

nasi

Frontal process of maxilla

Alar cartilage of nose and

upper lip

Facial Nerve

(VII)

Raises upper lip and opens

nostril

Levator

anguli oris

Maxilla below infra-orbital

foramenSkin at the corner of mouth

Facial Nerve

(VII)

Raises corner of mouth, helps

form nasolabial furrow

Orbicularis

oris

From muscles in area, maxilla

and mandible in midlineForms ellipse around mouth

Facial Nerve

(VII)Closes lips, protrudes lips

Buccinator

Posterior parts of maxilla and

mandible, pterygomandibular

raphe

Blends with orbiularis oris

and into lips

Facial Nerve

(VII)

Presses the cheek against

teeth, compresses distended

cheeks

Other

Muscle

Groups

Anterior

auricular

Anterior part of temporal

fasciaInto helix of ear

Facial Nerve

(VII)

Draws ear upward and

forward

Superior

auricular

Epicranial aponeurosis on side

of headUpper part of auricle

Facial Nerve

(VII)Elevates ear

Posterior

auricular

Mastoid process of temporal

boneConvexity of concha of ear

Facial Nerve

(VII)

Draws ear upward and

backward


3/3

Occipitofro-

ntalis

Frontal belly- Skin of

eyebrows; Occipital belly-

Lateral part of superior nuchal

line of occipital bone and

mastoid process of temporalbone

Frontal belly- Into galea

aponeurotica; Occipital belly-

Into galea aponeurotica

Facial Nerve

(VII)

Wrinkles forehead, raises

eyebrows; Draws scalp

backward

Documents

KD 02 - Facial Muscles