FACIAL MUSCLES Flashcards by gelica henson

Facial muscles develop from the..

Second pharyngeal arch

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Various structures in the facial area are located between the…
Superiorly:
Inferiorly:
Laterally:

S: superciliary arches
I: lower edge of mandible
L: ears

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Facial muscles are innervated by

Branches of the facial nerve 7

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Facial muscles are located in the

Superficial fascia

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Facial muscles
Originate from:
Inserts in:

O: bone or fascia
I: skin

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They are referred to as muscles of facial expressions

Facial muscles

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Facial muscles act as _ & _ of the orifices of the face

Sphincters and dilators

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3 groups of facial muscles

Orbital
Nasal
Oral

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Muscles in the orbital group

Orbicularis oculi ( outer orbital and inner palpebral part)
Corrugator supercilii

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Muscles in the nasal group

Nasalis
Procerus
Depressor septi nasi

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Muscles in the oral group

Orbicularis oris
Buccinator muscle
Upper group of muscles
Lower group of muscles

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Muscles of the UPPER GROUP of ORAL

Risorius
Zygomaticus MAJOR & MINOR
Levator labii superioris
Levator labii superioris alaeque nasi
Levator anguli oris

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Muscles of LOWER GROUP of ORAL

Mentalis
Depressor labii inferioris
Depressor anguli oris

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A large muscle that completely surrounds each orbital orifice and extends into each eyelid

Orbicularis oculi

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Major action of orbicularis oculi

Closes the eyelids

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2 parts of orbicularis oculi

Outer orbital part

Inner palpebral part

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A broad ring that encircles the orbital and extends beyond the orbital rim

Outer orbital part

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Closes the eyelid more FORCEFULLY and produce some wrinkling on the face

Outer orbital part

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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

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Closes the eye GENTLY

Inner palpebral part

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Second muscle in the orbital group which is deep to the eyebrows and the orbicularis oculi muscle

Corrugator supercilii

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Muscle active when FROWNING

Corrugator supercilii

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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)

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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