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

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 Table 4-2 pg. 100 Buccinator: Moves “bolus” of food Fig 4_11

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Facial Muscles – Raising Chin Table 4-2 pg. 100 Mentalis: Raises chin, protrudes lower lip, and Decreases depth of lower vestibule. 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 Table 4-2 pg. 100 Platysma: Raises skin of neck and lowers corner of mouth. Fig 4-17

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

The End