2 disc and 2 replies due in 16 hours
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Ch3_RemainingMuscles.pptxMuscles of the Face, Head, and Neck
Restorative Art I
More muscles that influence surface form and expressions
Quadratus Labii Superioris (2)
AKA: QLS
Is a group of 3 muscles that act:
Independently AND in unison
The muscles are broad and extend along the lower margin of the eye socket
Levator labii superioris alaeque nasi (2)
Levator labii superioris (2)
Zygomaticus minor (2)
Levator labii superioris alaeque nasi
Don’t freak out! Break it down!!!
You know levator
Labii: think “labial” for lip
You know superioris
Alaeque: think “wing”
Nasi: think “nasal”
So, what does this muscle do? Quiz yourself!!
Is the medial muscle of the QLS
Often called the common elevator
Is a long, narrow muscle running along the nose
Alaeque nasi is Latin for “wing of the nose
This muscle raises the upper lips and dilates the nostrils (think a dragon’s flaring nostril)
AKA: The “Elvis muscle” or “sneering muscle”
Levator labii superioris
There are 2
Break it down and tell me what they do…quiz yourself
Elevate (raise) the upper lip
It is lateral to the LLSAN that we just went over
Zygomaticus Minor
There are 2
Which bone does this muscle sound like?
Where is this bone located?
This muscle draws the upper lip superiorly and laterally
Is the most lateral muscle of the QLS
It inserts into the upper lip at the angle of the mouth
Now, let’s practice with the QLS
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Z L L L L Z
1
2
3
3
2
1
Z, for Zygomaticus minor, are the most lateral
1. zygomaticus minor
2. levator labii superioris
3. levator labii superioris alaeque nasi
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Now, moving on…
New Muscles Await
Levator anguli oris (2)
Small muscle at the angle of the mouth
Elevates angle of the mouth
Is located in the vicinity of the canine teeth
Originates from the canine fossa
Is hidden behind the QLS group
Often called the Caninus muscle
A. Levator Labii Superioris Alaeque Nasi B. Levator Labii Superioris C. Zygomaticus Minor D. Zygomaticus Major E. Levator Anguli Oris F. Orbicularis Oris G. Node H. Risorius I. Platysma J. Depressor Anguli Oris K. Depressor Labii Inferioris L. Mentalis
Zygomaticus Major (2)
Small muscle at the angle of the mouth
Elevates the angle of the mouth
Called the “Laughing Muscle” or “Smiling Muscle”
Is lateral to the QLS group
Draws the angle of the mouth backwards and upwards
Helps create the prominence of the nasolabial fold
Contributes to fullness of angulus oris eminence
Buccinator (2)
AKA: Trumpeter’s muscle
Main muscle of the cheek and lateral wall of the mouth
Is a quadrilateral muscle in the soft area of the cheek
Originates in the skin over the molars
Inserts into the skin at the angulus oris
(Corners of the mouth)
Makes up part of the angulus oris eminences
Compresses the cheek when contracted
Pulls the anguli oris posteriorly
Makes a sucking action
Risorius (2)
Extends from the skin over the masseter muscles to the corners of the mouth
Draws corners of the mouth posteriorly
Creates a “False smile” or a “smirk”
Muscle is narrow and superficial and runs across the cheek
Originates in fascia over the masseter
Is antagonist to the buccinator
Depressor anguli oris (2)
AKA: Triangularis
Is a three-sided muscle
Rises from the mandible and inserts into the anguli oris
Depresses the angle of the mouth
Contributes to the fullness of prominence of the angulus oris eminence
Depressor labii inferioris (2)
Depresses the lower lip
Inferiorly and laterally
Is associated with “fear” or “distaste”
When contracted:
Pulls lower lip downward and slightly to the side
Changes the form of the line of mouth closure
Causes angulus oris sulcus to become oblique
Mentalis (1)
Located:
On the tip of the chin (on the prominence of the mental eminence)
And, between the two depressor labii inferioris muscles
Elevates and protrudes lower lip
Wrinkles skin over chin
Inserts into the “skin of the chin”
Platysma (2)
Thin, broad, and flat muscle covering the anterior portion of neck
Wrinkles skin of the neck and chest
Depresses mandible and anguli oris
Think: Pouting
Is superficial, and softens contours of the neck
Arises from the fascia covering the large muscles in the region of the collarbone, ribs, and shoulder
Sternocleidomastoid (2)
AKA: SCM
Break it down: (Will help with origin)
Sterno—sternum
Cleido—clavicle
Mastoid—that’s a given
Thick muscle
Originates from mastoid process of temporal
Medial and posterior to the ear
Can:
Rotate and depress the head
Move the head sideways
Pull head forward
Has a small triangular space between the two points
Important place for embalmers
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Digastricus (2)
AKA: Digastric
Double-bellied muscle of the neck
(Remember, “di” = 2)
Anterior belly: Extends from mandible
Posterior belly: Attaches to mastoid process
Draws the hyoid superiorly
The anterior belly of the two muscles is responsible for one form of the cords of the neck
The End
Mayer, J. Sheridan. 1980. Reprint 2015.
DIFS Presentation. No date. Klicker Reference.
