muscles of face and scalp

O Frontalis (Occipitofrontalis)

•Galea aponeurotica

I Frontalis (Occipitofrontalis)

•skin and muscles of eyebrow and root of nose

A Frontalis (Occipitofrontalis)

Raises eyebrows (transverse wrinkles

across forehead) (expressions of surprise/fright)

N Frontalis (Occipitofrontalis)

-Temporal branch

of Facial CN VII

O Occipitalis (Occipitofrontalis)

•lateral 2/3 of superior nuchal line on occipital bone and  mastoid part of temporal bone

I Occipitalis (Occipitofrontalis)

Epicranial aponeurosis

A Occipitalis (Occipitofrontalis)

retracts the scalp; increases effectiveness of frontal belly

N Occipitalis (Occipitofrontalis)

CN VII, posterior auricular branch

O Orbicularis Oculi (orbital sphincter)

Orbital part: Overlying the orbital rim, attached to the nasal part of frontal bone and frontal process of maxilla medially

Palpebral part: arises from the anterior surface of the medial palpebral ligament and is mostly located within the eye lid

Lacrimal part: arises from lacrimal bone

I Orbicularis Oculi (orbital sphincter)

skin around the margin of the orbit, some fibers spread

downward on the cheek, and blend w/adjacent muscular or

ligamentous structures. Some fibers insert into the tarsi and lateral palpebral raphe.

A Orbicularis Oculi (orbital sphincter)

Palpebral part: closes eyes gently

(i.e. blinking, sleep)

Orbital part: stronger closing

(i.e. winking, squinting)

Lacrimal part: draws eyelids and lacrimal papillae medially, to aid in the drainage of tears from the lacrimal sac.

N Orbicularis Oculi (orbital sphincter)

CNVII, temporal and zygomatic branches

O Corrugator supercillii

Medial end of the supercilliary arch on frontal bone

I Corrugator supercillii

Deep surface of the skin above the middle of the orbital

arch

A Corrugator supercillii

Draws the eyebrows downward and inward, with vertical

wrinkles in the forehead (frowning mm)

N Corrugator supercillii

CN VII, temporal and zygomatic branches

O Procerus

Fascia aponeurosis over the nasal bone and the lateral

nasal cartilage

I Procerus

In to the skin over lower part of the forehead between

eyebrows

A Procerus

Pulls inner angle of the eyebrows downward and

produces transverse wrinkles over bridge of the nose

N Procerus

CNVII, buccal branch

O Nasalis

• Alar portion: maxilla

• Transverse portion: above and lateral to incisive fossa of the

maxilla

I Nasalis

• Alar portion: into ala of nose

• Transverse portion: by aponeurosis with nasalis on the

opposite side

A Nasalis

• Alar portion: enlarges the nostrils

• Transverse portion: depresses cartilaginous part of the nose,

drawing the point of the nose downward and narrowing the

nostrils

N Nasalis

CNVII, buccal branch

O Levator labii superioris alaeque nasi

Root of nasal process of the maxilla

I Levator labii superioris alaeque nasi

Greater alar cartilage, skin of the nose, and lateral part of

the upper lip

A Levator labii superioris alaeque nasi

Elevate and protrude the upper lip

N Levator labii superioris alaeque nasi

CNVII, buccal branch

O Levator labii superioris

infra-orbital margin from the maxilla and zygomatic bone

I Levator labii superioris

skin of upper lip

A Levator labii superioris

elevate the upper lip

N Levator labii superioris

CNVII, buccal branch

O Zygomaticus major

Zygomatic bone, anterior to the temporal process

I Zygomaticus major

Angle of the mouth

A Zygomaticus major

Draws angle of the mouth up and out (as in a smile)

N Zygomaticus major

CNVII, buccal branch

O Zygomaticus minor

Anterior aspect of zygomatic bone (malar surface)

I Zygomaticus minor

Orbicularis oris of the upper lip

A Zygomaticus minor

Deepens the nasolabial furrow (as in expressions of

sadness)

N Zygomaticus minor

CNVII, buccal branch

O Levator anguli oris

Infra-orbital maxilla (canine fossa)

I Levator anguli oris

Angle of the mouth, blending with the orbicularis oris

A Levator anguli oris

Draws the angle of the mouth straight upward,

deepening the nasolabial furrow, as in expressions of

contempt or disdain

N Levator anguli oris

CNVII, buccal branch

O Risorius

Fascia over the masseter (parotid fascia)

I Risorius

Into the skin at the angle of the mouth

A Risorius

Retracts the angle of the mouth

N Risorius

CNVII, buccal, and mandibular branches

O Depressor labii inferioris

Oblique line of the mandible

I Depressor labii inferioris

Skin of lower lip, blending with the orbicularis oris

A Depressor labii inferioris

Draws lower lip downward and slightly sideways, as in

expressions of irony

N Depressor labii inferioris

CNVII, mandibular branch

O Depressor anguli oris

Oblique line of the mandible

I Depressor anguli oris

Angle of the mouth

A Depressor anguli oris

Depress the angle of the mouth

N Depressor anguli oris

CNVII, mandibular branch

O Mentalis

body of mandible (anterior to

roots of inferior incisors)

I Mentalis

skin of the chin (mentolabial

sulcus)

A Mentalis

raise the skin of the chin,

protruding the lower lip

N Mentalis

CNVII, mandibular branch

O Orbicularis oris

medial maxilla and mandible

I Orbicularis oris

Into skin and mucous membranes of the lips

A Orbicularis oris

Closes lips and protrudes them forward

N Orbicularis oris

CNVII, buccal branch

O Buccinator

Alveolar processes of the maxilla, buccinators ridge of

the mandible, and pterygoid mandibular ligament

I Buccinator

Orbicularis oris at angle of the mouth

A Buccinator

Compresses the cheeks

N Buccinator

CNVII, buccal branch