muscles of facial expression
TRANSCRIPT
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
?