muscles of facial expression

Muscles

of

Facial

Expression

Maj Rishi PokhrelDept of Anatomy

NAIHS

www.slideshare.net

Anatomy

of

dimple

Panniculus carnosus?

Role of muscles of facial expression?

ClassificationOrifice Dilator Sphincter

Orbital 1. Frontalis of OF2. LPS

1. Orbicularis oculi

Nasal 1. Nasalis – lalar part (dialotor naris)

1. Nasalis – transverse part (compressor naris)

Oral 1. Levator labi superioris alaeque nasi

2. Levator labi superioris3. Levator anguli oris4. Zygomaticus minor5. Zygomaticus major6. Risorius7. Depressor anguli oris8. Depressor labii

inferioris9. Mentalis

1. Orbicularis oris

Some other MOFE

• Buccinator• Procerus• Corrugator supercilii• Platysma• Depressor septi

Branches of CN VII

Muscles of eyelid• Orbicularis oculi

• Palpebral part

– Medial palpebral ligament

– Lateral palpebral raphe

• Orbital part

– Ant lacrimal crest

– frontal process of maxilla

• Action

• Nerve supply: temporal & zygomatic

branches of CN VII

• LPS: muscles of eye

• Frontalis of OP: scalp

Other muscles around eyelids

Muscles around nostril

• Nasalis

– Transverse part -

Sphincter

– Alar part - dialator

Muscles of lips and cheeks

Buccinator

• Attachments – Both jaws opposite

molar teeth

– Pterygomandibular

raphae

– Upper and lower lips –

orbicularis oris

• NS: Buccal branch of VII

• Action• Pierced by parotid duct

Buccinator

Orbicularis oris

Orbicularis oris

• Fibers of buccinator

• Incisive slips

• Mental slips

• Modiolus

• NS: Buccal branch of VII

Other muscles around lips

Platysma• Below the clavicle

• Mandible

• Modiolus

• Risorius

• NS: cervical br of VII

• Action

FACIAL MUSCLES: ACTIONS

FACIAL MUSCLES: ACTIONS

Clinical anatomy• Functional importance

– Orbicular oculi

– Orbicularis oris

– Buccinator

• Aesthetic importance

– Modiolus

– Facial asymmetry

• Testing of CN VII

• Plastic surgery: e.g. artificial dimple

Dimple

•‘Cute birth defect’

•Short zygomaticus major

muscle

•Dimples may disappear with

age

•Can be created artificially

by shortening or splitting of

zygomaticus major

?