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Muscles of Face

Terms in this set (24)

Origin of Orbicularis Oris
-medial maxilla and the mandible
-deep surface of perioral skin
-angle of mouth
Insertion of Orbicularis Oris
mucous membrane of lips
Innervation of Orbicularis Oris
facial nerve (CN VII) via buccal branch
Action of Orbicularis Oris
phasic contraction compresses and protrudes lips (kissing) or resists distention (blowing)
Origin of Depressor Anguli Oris
anterolateral base of mandible
Insertion of Depressor Anguli Oris
angle of mouth
Innervation of Depressor Anguli Oris
facial nerve (CN VII) via mandibular branch
Action of Depressor Anguli Oris
-part of dilators of mouth
-depresses labial commissure bilaterally to frown (sadness)
Origin of Levator Labii Superioris
infraorbital margin (maxilla)
Insertion of Levator Labii Superioris
skin of upper lip
Innervation of Levator Labii Superioris
facial nerve (CN VII) via buccal branch
Action of Levator Labii Superioris
-elevate and/or evert upper lip
-deepen nasolabial sulcus (showing sadness)
Origin of Levator Anguli Oris
infraorbital maxilla (canine fossa)
Insertion of Levator Anguli Oris
angle of mouth
Innervation of Levator Anguli Oris
facial nerve (CN VII) via buccal branch
Action of Levator Anguli Oris
Part of dilators of mouth:
-elevate labial commissure, bilaterally to smile (happiness) and unilaterally to sneer (disdain)
Origin of Buccinator
-mandible
-alveolar process of maxilla and mandible
-pterygomandibular raphe
Insertion of Buccinator
-angle of mouth
-orbicularis oris
Innervation of Buccinator
facial nerve (CN VII) via buccal branch
Action of Buccinator
-presses cheek against molar teeth
-works with tongue to keep food between occlusal surfaces and out of oral vestibule
-resists distention (when blowing)
Origin of Orbicularis Oculi
-medial orbital margin
-medial palpebral ligament
-lacrimal bone
Insertion of Orbicularis Oculi
-skin around the margin of the orbit
-superior and inferior tarsal plates
Innervation of Orbicularis Oculi
facial nerve (CN VII) via temporal and zygomatic branches
Action of Orbicularis Oculi
-closes eyelids
-palpebral part does so gently
-orbital part does so tightly (winking)
THIS SET IS OFTEN IN FOLDERS WITH...