Anatomy - Muscles of Facial Expression - Final
The _____________ is the principal muscle of the cheek and the deepest muscle of the face and blends with the upper and lower lips
Buccinator
The transverse muscles move the corners of the lips laterally and compress the lips against the teeth. They are the _____________ and the __________.
Buccinator Risorius
The Levator _______ _____________ is superficial to the Levator ________ _____
Labii Superior Anguli Oris
Levator Labii Superior is an angular muscle but mostly just .....
elevates the lip as a whole
The Orbicularis Oris is a sphincter muscle that completely encircles the mouth opening. Not a single muscle though, it is composed of....
fibers from other facial muscles, as well as fibers exclusive to the lips -why we can stretch one have or raise 1 sections
Most of the facial muscles that move the lips...
insert into it
Some fibers decussate which means they
crisscross so the inferior fibers enter the upper lip and superior fibers enter lower lip
Levator Anguli Oris, lateral to ________ ____, draws the corners of mouth _____________ and assists in mouth __________ by ...
nasal ala (where cheek bone starts to protrude) superiorly closing by drawing lower lip (corner) superiorly
Transverse expression of the lips courses horizontally and can be acted on by...
pulling/compressing the lips against teeth
The Mentalis is the mental tuberosity of mandible. Some fibers are in the ______ of the chin, some into __________ _____. It acts to __________ ______, __________ lower lip, and is therefore referred to as the pouting muscle.
skin orbicularis oris wrinkle chin evert (protrude) lower lip
Zygomatic Major is the __________ muscle
smiling it brings corners of mouth up
Depressor Anguli Oris is __________ to depressor labii inferior, and is considered a frowning muscle. Some fibers ______ into the __________ ____. It depresses the lip angle and assists in __________ __________ by __________ __________ ___ __________ _____________
superficial cross into the upper lip mouth closing by drawing upper lip corners inferiorly
The vertical muscles insert into the orbicularis oris at the corners of the lips from either directly above or below. They are the __________ Anguli Oris, __________ Anguli Oris and __________
Levator Anguli Oris, Depressor Anguli Oris and Mentalis
The _________ is similar to the Buccinator but much smaller and assist in drawing mouth corner laterally by pulling outward/sideways
Risorius
Which muscle is the smiling muscle and which one is the frowning muscle?
Smile: Zygomatic Major Frown: Depressor Anguli Oris
Angular expression of the lips approaches corners of mouth obliquely from above or below and can be acted on by...
Smiling or frowning
The angular muscles insert into the orbicularis oris at an angle from either above or below the lips. Those muscles are the __________ Major, __________ _________ ______ and __________ _______ _________
Zygomatic Major, Levator Labii Superior and Depressor Labii Inferior.
Vertical expression of the lips enters corners of the mouth from directly above or below, also contributes to smiling and frowning but also ....
aids in movement of the lips open and close
The Buccinator compress the ______________________________________________ and draw the ____________________ laterally
lips and cheeks against teeth mouth corners
Depressor Labii Inferior, located beneath the ________ _____, just lateral to midline, draws the lower lip __________ and __________
lower lip down (inferiorly) and outward (laterally)
