1. Muscles of Facial Expression Lecture #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