Face

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  • 1. Face
  • 2. Muscles of face
    • Eyelids
    • Mouth
    • Nose
  • 3. Orbicularis oculi
    • 2 parts
    • Palpebral – from medial palpebral ligament to lateral palpebral raphae . Some fibres into posterior lacrimal crest & lacrimal sac
    • Orbital – larger , attached to anterior lacrimal crest & frontal process of maxilla. It forms concentric circles
  • 4.  
  • 5. Actions
    • Palpebral fibres- close lids gently
    • Orbital part – lowers the eyebrow
    • Together they close eyelids forcibly
  • 6. Orbicularis oris
    • Intrinsic fibres – from mandible & maxilla near midline . Deepest fibres
    • Extrinsic fibres – form bulk , most come from buccinator .
    • Action – narrowing of mouth
  • 7. Buccinator
    • Thin flat rectangular muscle
    • Origin – alveolar processes of maxilla and mandible opposite molar teeth , pterygomandibular raphae
    • Insertion – modiolus (knot of muscles lateral to angle of mouth , resp. for dimples)
  • 8. Actions
    • Accessory muscle of mastication
    • Return bolus of food from cheek pouch to molars
    • keeps the cheek taut so prevents it from folding & get injured during chewing
    • Forcible expulsion of air from mouth
  • 9.  
  • 10. Dilator muscles of mouth
    • Levator labii superioris aleque nasii
    • Levator labii superioris
    • Levator anguli oris
    • Zygomaticus minor & major
    • Depressor anguli oris
    • Depressor labii inferioris
  • 11.  
  • 12. Depressor anguli oris
  • 13.  
  • 14.  
  • 15.  
  • 16. Facial lacerations
    • No deep fascia
    • Loose SC tissue
    • Lacerations gape widely
    • Bruising & inflammation causes large swellings
    • Wrinkles occur perpendicular to muscle fibres
  • 17. Paralysis of facial muscles
    • Injury to 7 nerve
  • 18. Arterial supply
    • Facial a. – superior & inferior labial a. , lateral nasal a. , angular a.
    • Superficial temporal a. – gives transverse facial a.
    • Supra orbital & supra trochlear a. - branches of ophthalmic a.
  • 19. Veins of face
    • Supra orbital & supra trochlear veins join & form angular v. , continues as facial v.
    • Retromandibular v.- formed by joining of superficial temporal v. & max. v.
    • Dangerous area of face
  • 20. The End
  • 21.