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Muscles of Facial Expression Lecture #4

Muscles of Facial Expression Lecture #4. Head and Neck Anatomy H211. Facial Muscles – Terminology. “Levator. . .” - Raises “Depressor. . .” - lowers “Major” – the larger “Minor” – the smaller “Superioris” – superior “Inferiorioris” – inferior “Orbicularis” - encircles. Table 4-2 pg. 100.

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Muscles of Facial Expression Lecture #4

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  1. Muscles of Facial ExpressionLecture #4 Head and Neck Anatomy H211

  2. Facial Muscles – Terminology • “Levator. . .” - Raises • “Depressor. . .” - lowers • “Major” – the larger • “Minor” – the smaller • “Superioris” – superior • “Inferiorioris” – inferior • “Orbicularis” - encircles Table 4-2 pg. 100

  3. Facial Muscles – Surprise • Epicranial: Raises forehead, pulls scalp backward Fig 4-7

  4. Facial Muscles – Surprise • Epicranial: Raises forehead, pulls scalp backward Table 4-2 pg. 100

  5. Facial Muscles – Closing Eyelid • Orbicularis oculi: Closes eyelid Fig 4-9

  6. Facial Muscles – Closing Eyelid • Orbicularis oculi: Closes eyelid Table 4-2 pg. 100

  7. Facial Muscles – Frowning • Corrugator supercilii: Draws eyebrow medially Fig 4-9

  8. Facial Muscles – Frowning • Corrugator supercilii: Draws eyebrow medially Table 4-2 pg. 100

  9. Facial Muscles – Closing Lips • Orbicularis oris: Closes or purses lips Fig 4-10

  10. Facial Muscles – Closing Lips • Orbicularis oris: Closes or purses lips Table 4-2 pg. 100

  11. Facial Muscles – Assist Chewing Table 4-2 pg. 100 • Buccinator: Moves “bolus” of food Fig 4_11

  12. Facial Muscles – Opening Table 4-2 pg. 100 • Risorius: Smile widely Fig 4-12

  13. Facial Muscles – Opening • Risorius: Smile widely Table 4-2 pg. 100

  14. Facial Muscles – Raising Upper Lip Table 4-2 pg. 100 • Levator labii superioris: Raises upper lip Fig 4-13

  15. Facial Muscles – Raising Upper Lip • Levator labii superioris: Raises upper lip Table 4-2 pg. 100

  16. Facial Muscles – Raising Upper Lip Table 4-2 pg. 100 • Levator labii superioris alaeque nasi: Raises upper lip and widens nostril Fig 4-13

  17. Facial Muscles – Raising Upper Lip Table 4-2 pg. 100 • Levator labii superioris alaeque nasi: Raises upper lip and widens nostril

  18. Facial Muscles – Smiling Table 4-2 pg. 100 • Zygomaticus major: Draws cheek back and corner of mouth open Fig 4-13

  19. Facial Muscles – Smiling • Zygomaticus major: Draws cheek back and corner of mouth open Table 4-2 pg. 100

  20. Facial Muscles – Raising Upper Lip Table 4-2 pg. 100 • Zygomaticus minor: Raises upper lip Fig 4-13

  21. Facial Muscles – Raising Upper Lip • Zygomaticus minor: Raises upper lip Table 4-2 pg. 100

  22. Facial Muscles – Smiling Table 4-2 pg. 100 • Levator anguli oris: Raises angle of mouth Fig 4-13

  23. Facial Muscles – Smiling • Levator anguli oris: Raises angle of mouth Table 4-2 pg. 100

  24. Facial Muscles – Frowning Table 4-2 pg. 100 • Depressor anguli oris: Lowers angle of mouth Fig 4-15

  25. Facial Muscles – Frowning • Depressor anguli oris: Lowers angle of mouth Table 4-2 pg. 100

  26. Facial Muscles – Lowering Lower Lip Table 4-2 pg. 100 • Depressor labii inferioris: Lowers lower lip Fig 4-15

  27. Facial Muscles – Lowering Lower Lip • Depressor labii inferioris: Lowers lower lip Table 4-2 pg. 100

  28. Facial Muscles – Raising Chin Table 4-2 pg. 100 • Mentalis: Raises chin, protrudes lower lip, and Decreases depth of lower vestibule. Fig 4-16

  29. Facial Muscles – Raising Chin • Mentalis: Raises chin, protrudes lower lip, and decreases depth of lower vestibule. Table 4-2 pg. 100

  30. Facial Muscles – Grimacing Table 4-2 pg. 100 • Platysma: Raises skin of neck and lowers corner of mouth. Fig 4-17

  31. Facial Muscles – Grimacing • Platysma: Raises skin of neck and lowers corner of mouth Table 4-2 pg. 100

  32. The End

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