Lesson 1.3 - Facial Muscle

List the 3 heads of the Quadratus labii Superioris muscle.

-Levator Labii Superioris -Alaque Nasi -Zygomaticus Minor which emphasizes the Nasolabial fold.

the principle muscle of the cheek which compresses the cheeks and forms the lateral wall of the mouth.

Buccinator (Trumpeter's muscle)

What mark is formed by the Buccinator muscle?

Bucco-facial sulcus (the vertical furrow/wrinkle in the soft tissues of cheek)

a pyramid-shaped muscle of facial expression which draws the eyebrows inferiorly and medially.

Corrugator (Frowning muscle)

Another name for the frowning muscles

Corrugator muscles

The small, narrow muscle located at the medial end of the eyebrow

Currogator

Another name for the Quadratus Muscle

Depressor Labii Inferiorus

The quadrilateral muscle that approaches the lower lip from below and attaches between the middle of the mouth and the angle of the mouth

Depressor Labii Inferiorus

triangularis; a muscle of facial expression which depresses the angle of the mouth.

Depressor anguli oris (Triangularis)

quadratus; a muscle of facial expression which draws the lower lip inferiorly and slightly lateral.

Depressor labii inferiorus (Quadratus)

The double-bellied muscle which lies below the body of the mandible

Digastricus

a double-bellied muscle which draws the hyoid bone superiorly.

Digastricus

Another name for the occipito-frontalis muscle

Epicranius

the attachment of a muscle which moves the most when the muscle contracts; the ending.

Insertion

What is the physiological function of the occipito-frontalis muscle?

It draws the scalp backward raising the eyebrows.

Describe the location of the Sternocleidomastoid muscle.

It originates from the head of the sternum and clavicle and inserts at the mastoid process of the temporal bone.

Another name for the Zygomaticus Major Muscle

Laughing or Smiling Muscle

The intermediate head of the Quadratus Labii Superioris and raises the upper lip

Levator Labii Superioris

If the eyes will not properly close, this muscle may (though should NOT) be severed to aid in eye closure

Levator Palpebrae Superioris

a muscle of facial expression which elevates the angle of the mouth.

Levator anguli oris

a muscle of facial expression which elevates and extends the upper lip.

Levator labii superioris

a muscle of facial expression which elevates the upper lip and dilates the nostril opening; the common elevator;

Levator labii superioris alaque nasi (Common elevator)

The medial head of the Quadratus Labii Superioris

Levator labii superioris and alaque nasi (aka - common elevator)

a muscle of facial expression which raises the upper eyelid.

Levator palpebrae superioris

The thick quadrilateral muscle located on the side of the face near the angle of the mandible

Masseter

a muscle of mastication that closes the mandible.

Masseter

the act of chewing.

Mastication

the muscle that draws the scalp posteriorly and inferiorly and raises the eyebrows.

Mentalis Occipitofrontalis (Epicranius)

What facial markings are enhanced or formed by the Levator Angulis Oris?

Nasolabial fold and the Angulus Oris

The large muscle that covers the top and sides of the head

Occipital Frontalis Muscle

The facial markings which are formed or enhanced by the action of the Orbicularis Occuli

Optic facial sulci or Crows feet

The sphincter muscle of the mouth

Orbicularis Oris, aka Puckering Muscle

the muscle that closes the eyelids; compresses the lacrimal sacs.

Orbicularis oculi

the muscle that closes and puckers the lips.

Orbicularis oris (Puckering Muscle)

The attachment of a muscle which moves least when the muscle contracts; the beginning.

Origin

The eyelid.

Palpebra

The broad, flat superficial muscle of the neck

Platysma

thin layer of muscle covering anterior aspect of neck.

Platysma

Describe the location of the Buccinator Muscles.

Principle muscle of the cheek, lateral wall of the mouth

The long, thin muscle which extends vertically from the lower part of the nasal bone to the skin of the lower part of the forehead

Procerus

Draws the skin of the forehead inferiorly.

Procerus (Concentrating muscle)

The Transverse interciliary sulci are formed or accentuated by this muscle

Procerus, aka Concentrating muscle

the large, 3-bellied muscle extending from the cheekbone and lower rim of the eyesocket to the orbicularis oris, which raises the upper lip; its three bellies are (from medial to lateral) - levator labii superioris alaque nasi, levator labii superioris, and zygomaticus minor.

Quadratus labii superioris

the narrow superficial band of muscle which pulls the angle of the mouth laterally.

Risorius

The narrow, superficial muscle which runs across the cheek and attaches at the angle of the mouth

Risorius Muscle

The widest part of the neck is formed between these muscles

Sternocleidomastoid Muscle or SCM

Rotates and depresses the head.

Sternocleidomastoid muscle (SCM)

Closes the mandible; mastication and is the strongest chewing muscle.

Temporalis

What facial marking is enhanced by the Depressor Anguli Oris Muscle?

The Angulus Oris Eminence. The small, convex prominence, lateral to the end of the line of the lip closure of the mouth.

Another name for the Levator Labii Superioris Alaeque Nasi

The Common Elevator

The insertion point of the temporalis muscle

The Coronoid Process of the Mandible

Directionally, how are facial markings related to the muscle that creates them?

They usually lie perpendicular to the muscle that create them (at the right angle).

Describe the Quadratus Labii Superioris muscle.

This is a muscle that extends from the inferior eyesocket to the Orbicularis Oris; it has 3 bellies or heads. Levator Labii Superioris Alaque Nasi, Levator Labii, and Zygomaticus Minor which emphasizes the Nasolabial Fold - it elevates the upper lip.

Another name for the Depressor Anguli Oris Muscle

Triangularis Muscle

The facial markings produced by the corrugators

Vertical Interciliary Sulci

The muscle located lateral of the Quadratus Labii Superioris that descends obliquely from the posterior portion of the cheekbone to the angle of mouth

Zygomaticus Major Muscle

Draws the superior lip posteriorly, superiorily, and anteriorly.

Zygomaticus major (Laughing or Smiling muscle)

a muscle of the face which draws the superior lip superiorly and anteriorly; the lateral belly of the quadratus labii superiorus muscle.

Zygomaticus minor

Another name for the Trumpeter's Muscle

buccinator muscle

The movable portion of a muscle which is attached to muscle or skin

insertion

The muscle of the mouth which is located in the region of the upper canine teeth

levator anguli oris

The muscle the raises the upper eyelid

levator palpebrae superioris

Do males or females have more definite facial markings due to muscle action?

males

The muscle which forms the exterior planes of the cheek

masseter

The muscle that wrinkles the chin

mentalis

Describe the location of the Depressor Anguli Oris.

of the Depressor Anguli Oris. Located inferior to the lateral portion of the mouth. Arises from the mandible to insert into the Anguli Oris.

The broad sphincter muscle that surrounds the eye

orbicularis oculi

The portion of a muscle which is attached to a fixed point

origin

The transverse wrinkles of the neck are enhanced or caused by this muscle

platysma

The type of muscle which encircles a natural orifice of the body

sphincter

The broad, fan shaped muscle that radiates above the ear

temporalis

What are the 2 main muscles of mastication?

temporalis and masseter muscles

The lateral head of the Quadratus Labii Superioris

zygomaticus minor