The depressor anguli oris (triangularis) is also associated with the corners of the mouth. Located opposite to the levator anguli oris, it pulls the corners of the mouth downward, producing a frown. The levator labii superioris is a broad muscle responsible for elevation of the upper lip.
What muscle draws lower lip down?
The depressor labii inferioris (quadratus) originates in front of the mandible, anterior to the mental foramen, and travels medially, intermingling with the orbicularis oris to insert into the skin and mucosa of the lower lip. Together these muscles act to draw the angles of the mouth down and laterally.
What muscle pulls the lips down and out?
Orbicularis oris muscle, also known as musculus orbicularis oris is a complex, multi-layered muscle which attaches through a thin, superficial musculoaponeurotic system to the dermis of the upper lip and lower lip and serves as an attachment site for many other facial muscles around the oral region.
What muscle draws the corners of the lips laterally and downward?
The depressor anguli oris pulls the corners of the mouth downward and laterally.What muscle pulls the lower lip down and back?
The mentalis originates from the mandible (lower jaw) and runs vertically from below the lower lip to the lower part of the chin. This muscle provides stability to the lower lip to allow it to pout. It causes protrusion of the lower lip and elevates the skin of the chin.
What facial muscle draws the Nares downward to widen them?
The procerus pulls the skin between the eyebrows downward, assists in flaring the nostrils and helps create an angry expression.
What muscle raises the corner of the mouth?
The zygomaticus major muscle raises the corners of the mouth and draws them posteriorly when a person smiles.
Which muscle causes smiling and is attached to the corners of the lips quizlet?
The zygomaticus major muscle is a muscle that controls facial expression, drawing the mouth’s angle upward and outward. The zygomaticus major muscle starts at the cheekbone and extends to the corner of the mouth. This muscle causes the corners of a person’s mouth to rise when they smile.Where is the triangularis muscle located?
Muscles of the head, face, and neck (labeled as triangularis near chin). The depressor anguli oris muscle (triangularis muscle) is a facial muscle. It originates from the mandible and inserts into the angle of the mouth. It is associated with frowning, as it depresses the corner of the mouth.
What muscle pulls the corners of the mouth upward and laterally when laughing?Actions. –The Zygomaticus major draws the angle of the mouth upwards and laterally as in laughing. The Mentalis is a conical fasciculus, situated at the side of the frenulum of the lower lip. It arises from the incisive fossa of the mandible and descends to be inserted into the skin of the chin.
Article first time published onWhat muscle is used to close and pucker the lips?
A ring of muscle encircling your mouth and anchored in your lips, the orbicularis oris (aka the “kissing muscle”) allows you to pucker and close your lips. The orbicularis oris also helps you to release air from the mouth forcibly.
What muscle tenses angle of mouth laterally?
Risorius Draws angle of mouth laterally as in grimacing. Mentalis Elevates and protrudes lower lip and pulls skin of chin up–pouting. Platysma Draws outer part of lower lip inferiorly and posteriorly as in pouting and depresses mandible.
What are temporal muscles?
The temporalis muscle is a thin, fan-shaped muscle situated within the temporal fossa of the skull. Along with the medial pterygoid, lateral pterygoid and masseter muscles, it belongs to the group masticatory muscles. The temporalis muscle runs superficially, from the temporal bone to the coronoid process of mandible.
What does mentalis muscle do?
The mentalis muscle (MT) is the only elevator of the lower lip and the chin, and it provides the major vertical support for the lower lip.
Which muscle attaches to the lower lip and protrudes the lower lip as in pouting when it contracts?
OriginMedial aspects of maxilla and mandible, perioral skin and muscles, modiolusInsertionSkin and mucous membrane of lipsActionCloses mouth, compresses and protrudes lipsInnervationBuccal branch of facial nerve (CN VII)
What causes an overactive mentalis muscle?
Hyperactivity of the mentalis muscle is most commonly found in patients with an incompetent lip or patients with upper incisor protrusion. This hyperfunction arises from the muscle compensating for the skeletal discrepancy to make an anterior oral seal for normal oral function.
Where is the deltoid muscle located?
Where are the deltoid muscles located? Your deltoid muscles crown your shoulder, covering the front, side and back of the joint. They’re superficial, which means they’re close to the surface of your skin. The deltoid looks like an upside-down triangle.
Which muscle produces a downward sag of the mouth?
Platysma. The platysma is a single, sheetlike muscle that covers the anterolateral neck; its action is to pull the corners of the mouth inferiorly, producing a downward sag of the mouth. Sternocleidomastoid.
What muscles illustrated below are located above the corners of the mouth and raise them as in snarling?
(also known as the Levator Anguli Oris) Located above the corners of the mouth, raises the angle of the mouth, as in snarling. (also known as the Depressor Anguli) Located below the corners of the mouth, draws the corners of the mouth down, as in expressing depression.
What is the Modiolus of mouth?
The modiolus is defined in various dental dictionaries as a point lateral to the corner or angle of the mouth where certain muscles of facial expression converge (Jablonski, 1982; Manhold and Balbo, 1985; Harty and Ogston, 1987).
Which of these muscles inserts into the lip mucosa?
Orbicularis orisOriginMaxilla and mandibleInsertionSkin around the lipsArteryInferior labial artery and superior labial artery.Nervecranial nerve VII, buccal branch
What is orbicularis oculi origin?
OriginNasal part of frontal bone, frontal process of maxilla, medial palpebral ligament, lacrimal boneInnervationTemporal and zygomatic branches of facial nerve (CN VII)Blood supplyMaxillary, superficial temporal, facial and ophthalmic arteries.
What muscle draws eyebrows together and creates vertical wrinkle lines above the nose?
Function. The corrugator supercilii muscle draws the eyebrow downward and medially, producing the vertical wrinkles of the forehead.
Which muscle covers the back side of the head and retracts the scalp quizlet?
When this muscle contracts, it raises the eyebrows and wrinkles the skin of the forehead. The occipital belly of the occipitofrontalis covers the posterior side of the head. When this muscle contracts, it retracts the scalp slightly. Deep to the frontal belly is the corrugator supercilii.
Which muscles attach to the sclera of the eye and function to move the eyeball?
EXTRAOCULAR MUSCLES: These muscles originate in the eye socket (orbit) and work to move the eye up, down, side to side, and rotate the eye. The superior rectus is an extraocular muscle that attaches to the top of the eye. It moves the eye upward.
What is frontalis muscle?
The frontalis muscle is responsible for elevating the eyebrows, while the corrugator supercilii, orbicularis oculi, and procerus play a role in its depression. The function of the forehead is often spared in middle cerebral artery strokes.
What is the Buccinator muscle?
The buccinator muscle plays an active role along with orbicularis oris and superior constrictor muscle during swallowing, mastication, blowing, and sucking. It aids in mastication and blowing by compressing the cheek inwards.
What is Procerus muscle?
The procerus muscle is a pyramidal-shaped muscle arising from the fascia of the superior nasal region, near the junction of the nasal bones, and the superolateral nasal cartilage. [1] The procerus muscle fibers run superiorly and merge with the frontalis muscle. Muscle fibers insert into the skin between the eyebrows.
What is the Risorius muscle?
The risorius muscle is a narrow bundle of muscle fibers that becomes narrower from its origin at the fascia of the lateral cheek over the parotid gland and superficial masseter and platysma muscles, to its insertion onto the skin of the angle of the mouth.
What muscle is used to form the horizontal frown crease?
The muscles that are used to form the vertical frown crease on the forehead are the corrugator supercilii. In Latin, Corrugator means one that wrinkles. Horizontal frown lines are caused by the procerus muscle.
What muscle attaches to the temporal line?
Temporalis muscleThe temporalis muscle; the zygomatic arch and masseter have been removed.DetailsOrigintemporal lines on the parietal bone of the skull and the superior temporal surface of the sphenoid boneInsertioncoronoid process of the mandible and retromolar fossa
