FACIAL MUSCLES Flashcards
Facial muscles develop from the..
Second pharyngeal arch
Various structures in the facial area are located between the…
Superiorly:
Inferiorly:
Laterally:
S: superciliary arches
I: lower edge of mandible
L: ears
Facial muscles are innervated by
Branches of the facial nerve 7
Facial muscles are located in the
Superficial fascia
Facial muscles
Originate from:
Inserts in:
O: bone or fascia
I: skin
They are referred to as muscles of facial expressions
Facial muscles
Facial muscles act as _ & _ of the orifices of the face
Sphincters and dilators
3 groups of facial muscles
Orbital
Nasal
Oral
Muscles in the orbital group
Orbicularis oculi ( outer orbital and inner palpebral part) Corrugator supercilii
Muscles in the nasal group
Nasalis
Procerus
Depressor septi nasi
Muscles in the oral group
Orbicularis oris
Buccinator muscle
Upper group of muscles
Lower group of muscles
Muscles of the UPPER GROUP of ORAL
Risorius Zygomaticus MAJOR & MINOR Levator labii superioris Levator labii superioris alaeque nasi Levator anguli oris
Muscles of LOWER GROUP of ORAL
Mentalis
Depressor labii inferioris
Depressor anguli oris
A large muscle that completely surrounds each orbital orifice and extends into each eyelid
Orbicularis oculi
Major action of orbicularis oculi
Closes the eyelids
2 parts of orbicularis oculi
Outer orbital part
Inner palpebral part
A broad ring that encircles the orbital and extends beyond the orbital rim
Outer orbital part
Closes the eyelid more FORCEFULLY and produce some wrinkling on the face
Outer orbital part
In the eyelids
Consists of muscle fibers in the MEDIAL CORNER OF THE EYE that arch across each lid to attach laterally
Inner palpebral part
Closes the eye GENTLY
Inner palpebral part
Second muscle in the orbital group which is deep to the eyebrows and the orbicularis oculi muscle
Corrugator supercilii
Muscle active when FROWNING
Corrugator supercilii
Corrugator supercilii
Origin:
Insertion:
Action:
Origin: Medial end of the superciliary arch
Insertion: skin of the medial half of the eyebrows
Action: draws the eyebrows towards the midline (causing VERTICAL WRINKLES above the nose)
Cause the VERTICAL WRINKLES above the nose
corrugator supercilii
Major muscle of the nose
Nasalis
Largest and best developed muscle of the nose
Nasalis
Muscle that is active when the nares are flared
Nasalis
Parts of NASALIS
Transverse part / Compressor naris
Alar part / dilator naris
Transverse part or Compressor naris
Origin:
Insertion:
Action:
Origin: maxilla
Insertion: aponeurosis
Action: compresses the nares
Alar part or Dilator naris
Origin:
Insertion:
Action:
Origin: maxilla
Insertion: alar cartilage
Action: draws the alar cartilage downward and laterally
A small muscle superficial to the nasal bone
Procerus
Produce TRANSVERSE WRINKLES over the bridge of the nose
Procerus
Procerus
Origin:
Insertion:
Action:
Origin: nasal bone & upper part of the lateral nasal cartilage
Insertion: skin- over the lower part of the forehead between the eyebrows
Action: draws the medial border of the eyebrows downward = transverse wrinkles
Depressor septi nasi
Origin:
Insertion:
Action:
Origin: maxilla (above CI)
Insertion: lower part of nasal septum
Action: assists in widening the nares
A COMPLEX MUSCLE completing encircling the mouth
Orbicularis oris
Orbicularis oris
Origin:
Insertion:
Action:
Origin: maxilla (sup/inf) / Buccinator
Insertion: SKIN and mucous membrane of the LIPS and INTO ITSELF
Action: for pursing the lips “whistling”
Forms the muscular component of the cheek
Buccinator
Used for forceful air expulsion
Buccinator
Buccinator
Origin:
Insertion:
Action:
Origin: post part of MAXILLA and MANDIBLE opposite MOLAR TEETH & PTERYGOMANDIBULAR RAPHE
Insertion: lips
Action: assist in the forceful expulsion of air from the cheeks
Depressor anguli oris
Origin:
Insertion:
Action:
Origin: mandible- below canine premolar and 1st molar
Insertion: skin and orbicularis oris near CORNER of mouth
Action: depresses the CORNER of the mouth
Depressor labii inferioris
Origin:
Insertion:
Action:
Origin: infront of mandible
Insertion: lower lip
Action: depresses lower lip and moves it laterally
Mentalis
Origin:
Insertion:
Action:
Origin: mandible - inf to incisor
Insertion: skin of the chin
Action: raises and protrudes the lower lip
Deepest muscle of the lower grp of oral
Mentalis
Helps position the lip when drinking from a cup or when pouting
Mentalis
Wrinkles the skin of chin
Mentalis
Thin superficial muscle that extends laterally from the corner of the mouth
Risorius
Produces a GRIN
Risorius :D
Pulls the corner of mouth laterally and upwards :D
Risorius
Muscles that Produce a smile :)
Zygomaticus major and minor
Muscles that Rises the corner of the mouth and move it laterally :)
Zygomaticus major and minor
Zygomaticus major
Origin:
Insertion:
Action:
Origin: deep to orbicularis oculi along the post part of lat surface of zygomatic bone
Insertion: skin at the corner of the mouth
Action: rises the corner of mouth and move it laterally
Zygomaticus minor
Origin:
Insertion:
Action:
Origin: zygomatic bone ant to the organs pf the zygomaticus major
Insertion: upper lip, medial to the corner of the mouth
Action: raise the corner of mouth and move it laterally
Levator labii superioris
Origin:
Insertion:
Action:
Origin: maxilla
Insertion: skin of lip
Action: deepens furrow bet nose and corner of mouth during SADNESS
Levator Labii Superioris Alaeque Nasi
Origin:
Insertion:
Action:
Origin: maxilla, next to the nose
Insertion: alar cartilage and skin of upper lip
Action: assist in flaring the nares
Medial to levator labii superioris
Lls alaeque nasi
Levator anguli oris
Origin:
Insertion:
Action:
Origin: maxilla
Insertion: skin at corner of mouth
Action: elevates corner of mouth
More deeply placed and covered by the other two levators and the zygomaticus muscles
Levator anguli oris
HELP deepen the furrow bet nose and corner of mouth during sadness
Levator anguli oris
