muscles of facial expression
TRANSCRIPT
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Muscles
of
Facial
Expression
Maj Rishi PokhrelDept of Anatomy
NAIHS
www.slideshare.net
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Anatomy
of
dimple
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Panniculus carnosus?
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Role of muscles of facial expression?
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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
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Some other MOFE
• Buccinator• Procerus• Corrugator supercilii• Platysma• Depressor septi
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Branches of CN VII
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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
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Other muscles around eyelids
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Muscles around nostril
• Nasalis
– Transverse part -
Sphincter
– Alar part - dialator
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Muscles of lips and cheeks
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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
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Buccinator
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Orbicularis oris
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Orbicularis oris
• Fibers of buccinator
• Incisive slips
• Mental slips
• Modiolus
• NS: Buccal branch of VII
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Other muscles around lips
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Platysma• Below the clavicle
• Mandible
• Modiolus
• Risorius
• NS: cervical br of VII
• Action
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FACIAL MUSCLES: ACTIONS
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FACIAL MUSCLES: ACTIONS
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Clinical anatomy• Functional importance
– Orbicular oculi
– Orbicularis oris
– Buccinator
• Aesthetic importance
– Modiolus
– Facial asymmetry
• Testing of CN VII
• Plastic surgery: e.g. artificial dimple
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Dimple
•‘Cute birth defect’
•Short zygomaticus major
muscle
•Dimples may disappear with
age
•Can be created artificially
by shortening or splitting of
zygomaticus major
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?