Muscles of Facial ExpressionLecture #4

Head and Neck AnatomyH211

Facial Muscles – Terminology

• “Levator. . .” - Raises• “Depressor. . .” - lowers• “Major” – the larger• “Minor” – the smaller• “Superioris” – superior• “Inferiorioris” – inferior• “Orbicularis” - encircles

Table 4-2 pg. 100

Facial Muscles – Surprise

• Epicranial: Raises forehead, pulls scalp backward

Fig 4-7

Facial Muscles – Surprise

• Epicranial: Raises forehead, pulls scalp backward

Table 4-2 pg. 100

Facial Muscles – Closing Eyelid

• Orbicularis oculi: Closes eyelid

Fig 4-9

Facial Muscles – Closing Eyelid

• Orbicularis oculi: Closes eyelid

Table 4-2 pg. 100

Facial Muscles – Frowning

• Corrugator supercilii: Draws eyebrow medially

Fig 4-9

Facial Muscles – Frowning

• Corrugator supercilii: Draws eyebrow medially

Table 4-2 pg. 100

Facial Muscles – Closing Lips

• Orbicularis oris: Closes or purses lips

Fig 4-10

Facial Muscles – Closing Lips

• Orbicularis oris: Closes or purses lips

Table 4-2 pg. 100

Facial Muscles – Assist Chewing

• Buccinator: Moves “bolus” of food

Table 4-2 pg. 100

Fig 4_11

Facial Muscles – Opening

• Risorius: Smile widely

Table 4-2 pg. 100

Fig 4-12

Facial Muscles – Opening

• Risorius: Smile widely

Table 4-2 pg. 100

Facial Muscles – Raising Upper Lip

• Levator labii superioris: Raises upper lip

Table 4-2 pg. 100

Fig 4-13

Facial Muscles – Raising Upper Lip

• Levator labii superioris: Raises upper lip

Table 4-2 pg. 100

Facial Muscles – Raising Upper Lip

• Levator labii superioris alaeque nasi: Raises upper lip and widens nostril

Table 4-2 pg. 100

Fig 4-13

Facial Muscles – Raising Upper Lip

• Levator labii superioris alaeque nasi: Raises upper lip and widens nostril

Table 4-2 pg. 100

Facial Muscles – Smiling

• Zygomaticus major: Draws cheek back and corner of mouth open

Table 4-2 pg. 100

Fig 4-13

Facial Muscles – Smiling

• Zygomaticus major: Draws cheek back and corner of mouth open

Table 4-2 pg. 100

Facial Muscles – Raising Upper Lip

• Zygomaticus minor: Raises upper lip

Table 4-2 pg. 100

Fig 4-13

Facial Muscles – Raising Upper Lip

• Zygomaticus minor: Raises upper lip

Table 4-2 pg. 100

Facial Muscles – Smiling

• Levator anguli oris: Raises angle of mouth

Table 4-2 pg. 100

Fig 4-13

Facial Muscles – Smiling

• Levator anguli oris: Raises angle of mouth

Table 4-2 pg. 100

Facial Muscles – Frowning

• Depressor anguli oris: Lowers angle of mouth

Table 4-2 pg. 100

Fig 4-15

Facial Muscles – Frowning

• Depressor anguli oris: Lowers angle of mouth

Table 4-2 pg. 100

Facial Muscles – Lowering Lower Lip

• Depressor labii inferioris: Lowers lower lip

Table 4-2 pg. 100

Fig 4-15

Facial Muscles – Lowering Lower Lip

• Depressor labii inferioris: Lowers lower lip

Table 4-2 pg. 100

Facial Muscles – Raising Chin

• Mentalis: Raises chin, protrudes lower lip, and Decreases depth of lower vestibule.

Table 4-2 pg. 100

Fig 4-16

Facial Muscles – Raising Chin

• Mentalis: Raises chin, protrudes lower lip, and decreases depth of lower vestibule.

Table 4-2 pg. 100

Facial Muscles – Grimacing

• Platysma: Raises skin of neck and lowers corner of mouth.

Table 4-2 pg. 100

Fig 4-17

Facial Muscles – Grimacing

• Platysma: Raises skin of neck and lowers corner of mouth

Table 4-2 pg. 100

The End