The document describes the various facial muscles and their functions. It lists the orbicularis oculi muscle which closes the eyelid, the corrugator supercilii muscle which draws the eyebrow medially for frowning, and the orbicularis oris muscle which closes or purses the lips. It also discusses other facial muscles like the zygomaticus major which draws the cheek back and opens the corner of the mouth for smiling.

1. Muscles of Facial Expression
DR. RAHUL TIWARI
(+919968586876)

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
• Risorius: Smile widely
Table 4-2 pg. 100
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