Facial Muscle

The facial muscles are a group of striated skeletal muscles
supplied by the facial nerve. It control facial expression.
FACIAL MUSCLE
1
Dr. Sikandar Hayat
Bangash
BS – Dental
Gandhara University Peshawar
Tuesday, March 16, 2021

Table Of Contents
1 Occipitofrontalis Muscle
2 Temporoparietalis Muscle 5
3 Procerus Muscle 6
4 Nasalis Muscle 8
5 Depressor Septi Nasi Muscle 10
6 Orbicularis Oculi 12
7 Corrugator Supercilii 14
8 Depressor Supercilii 16
9 Depressor Anguli Oris Muscle 18
10 Orbicularis Oris Muscle 19
11 Auricle Muscle (Anterior, Posterior & Superior) 21 & 22
12 Risorius Muscle 24
13 Zygomaticus Major Muscle & Z. Minor Muscle 26
14 Levator Labii Superioris 28
15 Levator Labii Superioris Alaeque Nasi Muscle 30
16 Depressor Labii Inferioris 32
17 Levator Anguli Oris 33
18 Buccinator Muscle 34
19 Mentalis Muscle 36
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Tuesday, March 16, 2021 Facial Muscle

Muscle
A band or bundle of fibrous tissue in a human or animal body that has
the ability to contract, producing movement in or maintaining the
position of parts of the body.
Tuesday, March 16, 2021 F a c i a l M u s c l e 3

Facial Muscle
• There are 43 muscles in the face, most of which are controlled by the seventh
cranial nerve (Facial nerve). This nerve emerges from the skull just in front of
the ears.
 Facial nerve then splits into five primary branches:
1. Temporal.
2. Zygomatic.
3. Buccal.
4. Mandibular.
5. Cervical.

Occipitofrontalis Muscle
• The Occipitofrontalis muscle (epicranius muscle) is a muscle which covers
parts of the skull. It consists of two parts:
1. Frontalis Part: Originate from front of galea aponeurotica & Insert near the
eyebrow.
2. Occipitalis Part: Originate from superior nuchal line & Insert in galea
aponeurotica.
• Occipitofrontalis only serves for facial expressions.

Temporoparietalis Muscle
• Temporoparietalis is a scalp muscle that arises on each side from an
aponeurosis common to the auricularis muscle. It passes superiorly to insert
into the galeal aponeurosis.
Action: Its action is to fix the galeal aponeurosis.
Nerve: The temporal branch of the facial nerve.

Procerus Muscle
• The Procerus muscle is the pyramid-shaped muscle extending from the lower
part of the nasal bone to the middle area in the forehead between the
eyebrows, where it is attached to the frontalis muscle. Its location allows it
to pull the skin between the eyebrows down
Action: The Procerus muscle depresses the medial parts of the eyebrows
and wrinkles the skin between them.
Nerve: Temporal branch of the facial.

Nasalis Muscle
• The Nasalis is a sphincter-like muscle of the nose.
• It originates from the maxilla, Its fibers then course superomedially, expanding into
a thin aponeurosis at the bridge of the nose and inserts at the dorsum of the nose.
Function:
• It function is to compress the nasal cartilages. It is the muscle responsible for
"flaring" of the nostrils. Some people can use it to close the nostrils to prevent
entry of water when underwater.
Nerve:
• Buccal branch of the facial.

Depressor Septi Nasi Muscle
• Depressor Septi Nasi Muscle is an important and effective muscle in nasal dynamics.
Origin: Incisive fossa of the maxilla.
Insertion: Nasal septum.
Action:
• The depressor Septi is a direct antagonist of the other muscles of the nose, drawing
the ala of the nose downward, and thereby constricting the aperture of the nares.
Nerve: Buccal branch of the facial nerve

Orbicularis Oculi Muscle
• The orbicularis oculi is a muscle in the face that closes the eyelids. It arises from the
nasal part of the frontal bone.
Origin: Frontal bone, Medial palpebral ligament.
Insertion: Lateral palpebral ligament.
Action:
• Under the control of the facial nerve (cranial nerve VII), orbicularis oculi closes the
eye. Depending on the degree and frequency of closure.
Nerve:
• Upper half part receive from Temporal & Lower half from zygomatic branch of
facial nerve.

Corrugator Supercilii Muscle
• Corrugator is a Latin word meaning wrinkler of the eyebrows.
• The Corrugator Supercilii is a small, narrow, pyramidal muscle close to the
eye. It is located at the medial end of the eyebrow, beneath the frontalis and
just above orbicularis oculi muscle.
Origin: Frontal bone
Insertion: Forehead skin, near eyebrow
Action:
• It wrinkles forehead. Corrugator Supercilii exerts force on the skin above the
supraorbital margin. The combined actions of the orbicularis oculi and corrugator
muscle pull the eyebrows medially and inferiorly.
• This action can serve different functions, such as protecting the eyes from bright
sunlight or rain.

Depressor Supercilii Muscle
• The Depressor Supercilii muscle is located near the eye. many authorities
consider it to be part of the orbicularis oculi muscle.
Origin: Medial orbital rim
Insertion: Medial aspect of bony orbit
Action:
• It is thought to assist in moving and lowering the eyebrow. Also, it is
thought to assist in moving the glabella, which is the skin above the nose
and between the eyebrows
Nerve: Temporal branches of facial nerve

Depressor Anguli Oris Muscle
Origin: Oblique line and mental tubercle of mandible located on the anterior
aspect of the bone.
Insertion: Insert into the lips.
Action:
• Depressor Anguli Oris pulls the angle of the mouth inferolaterally. Its action
plays an important part in facial expression, as it helps expressing feelings of
sadness or anger
Nerve: Marginal mandibular and
Buccal branches of facial nerve.

Orbicularis Oris Muscle:
• Orbicularis Oris is a complex circular muscle that surrounds the orifice of the
mouth and forms the majority of the lips. It belongs to a large group of
muscles of facial expression called the buccolabial group.
Origin: Medial aspects of maxilla and mandible.
Insertion: Skin and mucous membrane of lips
Action:
• Pursing (tight) of the lips. These actions of the lips allow you to kiss
someone and sing your favorite song.
Nerve: Buccal and mandibular branches of facial nerve

Tuesday, March 16, 2021 Facial Muscle 20

Auricular Muscle
• Any of the three muscles surrounding the auricula or outer ear.
• There are three extrinsic auricular muscles.
1. Anterior auricular muscles
2. Superior auricular muscles
3. Posterior auricular muscles
• Six Intrinsic muscles:
1. Helices Major. 2. Helices Minor. 3. Tragicus.4. Anti Tragicus. 5.Transverse. 6. Oblique muscles.
Anterior Auricular Muscles: Smallest, thin and fan-shaped, and its fibers are
indistinct.
Origin: Lateral edge of the galeal aponeurotica.
Insertion: Inserted into a projection on the front of the helix.
Tuesday, March 16, 2021 Facial Muscle 21

Posterior Auricular Muscle:
Origin: Mastoid portion of the temporal bone.
Insertion: Inserted into the lower part of the cranial surface of the ear concha.
Superior Auricular Muscle: The superior auricular muscle: Largest, thin & fan-
shaped skin muscle of the ear. It forms part of the mimic muscles.
Origin: Galeal aponeurotica
Inserted: Upper part of the cranial surface of the auricula.
Action:
• Anterior pull the auricula forward and upward, Superior slightly raises it and
Posterior pull it backward.
Nerve: temporal branches of the facial nerve.

Concha

Risorius Muscle
• The Risorius is a muscle of facial expression. It is a narrow bundle of fibers,
broadest at its origin, but varies much in its size and form.
Origin: Near the parotid gland, Buccal skin, zygomatic bone
Insertion: Inserts onto the skin at the angle of the mouth.
Action:
• It helps pull the angle of the mouth towards the side of the person's face to
produce a grin or smile.

Zygomaticus Major Muscle
• The Zygomaticus major is a muscle of facial.
Origin: Zygomatic bone, in front of the Zygomaticotemporal suture
Insertion: Angle of the mouth.
Action:
• Pull the angle of the mouth superolaterally, it help in speech and creates
facial expressions. Along with Risorius, Zygomaticus major contributes in
laughing, which is why they are called the “laughing muscles”.
Nerve: Zygomatic and Buccal branches of the facial nerve.

Levator Labii Superioris Muscle
• The Levator Labii Superioris is a muscle of the human body used in facial
expression.
Origin: Maxillary process of zygomatic bone.
Insertion: Bend with upper lip muscle
Action: Its primary function is in raising the upper lip.

Levator Labii Superioris Alaeque Nasi Muscle
• Levator Labii Superioris Alaeque Nasi is one of the muscles of facial
expression acting on the mouth and nose.
• Long name of muscle in an animal
Origin: Superior frontal process of the maxilla
Insertion: Skin of the lateral side of the nostril and the upper lip.
Action:
• It primary purpose is to dilate the nostrils and elevate the upper lip. This
action enables a 'snarl ' facial expression,
Nerve: Zygomatic branches of the facial nerve (CN VII).

Depressor Labii Inferioris Muscle
• The Depressor Labii Inferioris is a facial muscle that helps lower the bottom
lip.
Origin: Oblique line of mandible.
Insertion: Skin and sub mucosa of lower lip.
Action:
• The function of this muscle group is to control
the position, shape and movements of the lips.
It depresses the lower lip inferolaterally.
Nerve: Mandibular branch of facial nerve.

Levator Anguli Oris Muscle
• The Levator Anguli Oris is a facial muscle of the mouth.
Origin: Canine fossa, immediately below the infraorbital foramen.
Insertion: Angle of the mouth.
Action:
• It participate in creating a smile.
Nerve: Buccal branches of the facial nerve.

Buccinator Muscle
• The Buccinator muscle is the major facial muscle underlying the cheek. It
holds the cheek to the teeth and assists with chewing.
Origin: From the alveolar processes of maxilla and mandible.
Insertion: In the fibers of the Orbicularis Oris.
Action:
• Its purpose is to pull back the angle of the mouth, which aids in holding the
cheek to the teeth during chewing. This action causes the muscle to keep
food pushed back on the occlusal surface of the posterior teeth, as when a
person chews.
Nerve: Buccal branches of facial nerve (CN VII).

Mentalis Muscle
• The Mentalis muscle is a paired muscle located at the tip of the chin.
Origin: Incisive fossa of mandible
Insertion: Skin of chin (Mentolabial sulcus)
Action:
• The main function is to elevate and protrude the bottom lip, which can
form a pout. This is why this muscle is nicknamed the pouting muscle.
When the Mentalis muscle contracts to raise and protrude the lower lip, it
also causes the chin to raise and wrinkle as well.
Nerve: Mandibular branch of the facial nerve (CN VII).

References:
• https://study.com/academy/lesson/mentalis-muscle-innervation-origin-insertion.html
• https://www.kenhub.com/en/library/anatomy/buccinator-muscle
• https://www.ncbi.nlm.nih.gov/books/NBK547688/#:~:text=The%20levator%20anguli%20oris
%20originates,deepest%20layer%20of%20mimetic%20muscle.&text=Levator%20anguli%20ori
s%20receives%20innervation,branches%20of%20the%20facial%20nerve
• http://www.meddean.luc.edu/lumen/MedEd/GrossAnatomy/dissector/mml/dli.htmhttps://w
ww.imaios.com/en/e-Anatomy/Anatomical-Parts/Levator-labii-superioris-alaeque-
nasi#:~:text=Description%3A,any%20muscle%20in%20an%20animal

Tuesday, March 16, 2021
Facial Muscle
40
Thank You For Giving Your Precious Time
Presented By: Sikandar Hayat Bangash
BS – DENTAL TECHNOLOGY

Facial Muscle

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