Muscles: Lips
Buccinator Compresses cheek (as in whistling and sucking); trampoline-like action holds food between teeth during chewing; draws corner of mouth laterally; well developed in nursing infants
What is the action?
Depression Labli Inferioris Draws lower lip inferiorly (as in a pout)
What is the action?
Depressor Anguli Oris Draws corners of mouth down and laterally (a "tragedy mask" grimace); zygomaticus antagonist
What is the action?
Levator Labii Superioris Opens lips; raises and furrows upper lip
What is the action?
Orbicularis Oris Closes lips; purses and protrudes lips; kissing and whistling muscle
What is the action?
Zygomaticus Major Raises lateral corners of mouth upward (smiling muscle)
What is the action?
Zygomaticus Minor Raises lateral corners of mouth upward (smiling muscle)
What is the action?
Depressor Anguli Oris body of mandible below incisors
What is the origin?
Buccinator orbicularis oris
Where is the insertion?
Depression Labli Inferioris skin and muscle of lower lip
Where is the insertion?
Depressor Anguli Oris skin and muscle at angle of mouth below insertion of zygomaticus
Where is the insertion?
Levator Labii Superioris skin and muscle of upper lip
Where is the insertion?
Orbicularis Oris encircles mouth; inserts into muscle and skin at angles of mouth
Where is the insertion?
Zygomaticus Major skin and muscle at corner of mouth
Where is the insertion?
Zygomaticus Minor skin and muscle at corner of mouth
Where is the insertion?
Buccinator molar region of maxilla and mandible
Where is the origin?
Depression Labli Inferioris body of mandible lateral to its midline
Where is the origin?
Levator Labii Superioris zygomatic bone and infraorbital margin of maxilla
Where is the origin?
Orbicularis Oris arises indirectly from maxilla and mandible; fibers blend with fibers of other facial muscles associated with the lips
Where is the origin?
Zygomaticus Major zygomatic bone
Where is the origin?
Zygomaticus Minor zygomatic bone
Where is the origin?
