Head & Neck Anatomy: Muscles Of Facial Expression Flashcards
End of the muscle attached to the less moveable structure; in facial expressions they are usually away from the lips
Origin
End of muscles attached to the more moveable structure
Insertion
All muscles of facial expressions are innervated by which cranial nerve
Seventh (VII)
Covers the forehead, top and back of the skull
Epicranial
The frontal and occipital (posterior) bellies are separated by the
Epicranial aponeurosis
Epicranial action
Raises the eyebrows
Wide muscle that overlies the superior surface of the scalp; consists of an occipital and a frontal part which are connected by a fibrous sheath called the Epicranial aponeurosis
Frontalis
The frontal part of the frontalis origin is the skin of the eyebrows. The action?
Contraction of the frontal part pulls the slap fore wards and wrinkles the forehead; producing a frown
Occipital part of the frontalis origin is the lateral two-thirds of the superior nuchal line of occipital bone. Action?
Retracts the scalp
Ring-like band of muscle that surrounds the eye
Orbicularis occuli
Origin of orbicularis oculi is orbital rim and insertion is fibers completely encircling the eye. Action?
Closes the eyelids , squints eyes and forms wrinkles
Small, narrow, triangular muscle around the medial end of the eyebrow
Corrugator supercilli
Corrugator supercilli origin is frontal bone in the supraorbital region, insertion is skin tissue of the eyebrow. Action?
Draws eyebrow medically and inferiorly towards the nose, creating wrinkles in the flagella region as in frowning
Muscle that encircles the mouth
Orbicularis oris
Orbicularis oris origin is maxilla and mandible and insertion is skin around the lips. Action?
Closes, rolls inwards and pouts lips outward. Known as the kissing muscle
Thin muscle between the maxilla and mandible in the cheek area
Buccinator
Buccinator origin is alveolar process of the maxilla/mandible and pterygomandibular raphe, insertion is corner of the mouth. Action?
Keeps food pushed back when chewing, compresses cheeks against the teeth, helps the sucking action and expels air
The Buccinator is pierced by which duct
Parotid duct
Horizontal muscle around the parotid glad area
Risorius
Risorius origin is fascia superficial to masseter muscle and insertion is corner of the mouth. Action?
Stretches lips laterally
* a real smile involves the Risorius, zygomaticus major and minor, levator anguli oris, creating an upward and out stretch of the mouth
Broad bands between the nostrils and upper lip
Levator labii superioris
Levator labii superioris origin is infraorbital rim of the maxilla, insertion is upper lip. Action?
Elevates the upper lip
Broad muscles around the nostrils
Levator labii superioris aleque nasi
Levator labii superioris aleque nasi origin is frontal process of the maxilla, insertion is ala of the nose and upper lip. Action?
Elevates the upper lip, dilates the nostril
Diagonal muscle along the cheekbone area
Zygomaticus major
Zygomaticus major origin is zygomaticus bone, insertion is corner of the mouth. Action?
Elevates the corner of the lips to create a smile
Smaller diagonal muscle above the zygomaticus major muscle
Zygomaticus minor
Zygomaticus minor origin is zygomatic bone, insertion is upper lip, next to the levator labii superioris muscle. Action?
Elevates the corner of the lips to create a smile
Vertical band of muscle between the eye and upper lip
Levator anguli oris
Levator anguli oris origin is maxilla and insertion is corner of the mouth. Action?
Elevates the corner of the lips to create a smile
Vertical band of muscle between the lower lip and chin
Depressor anguli oris
Depressor anguli oris origin is lower border of the mandible, insertion is the corner of the mouth. Action?
Depresses the angle of the mouth, to create a frown
Vertical band of muscle between the lower lip and chin; origin is lower border of the mandible and insertion is the skin of lower lip and action is to pull down the lower lip exposing the mandibular incisors
Depressor labii inferioris
Central pair of muscles from the lower lip to the chin. Origin is incisive fossa of the mandible and insertion is skin of the chin. Action is to elevate and wrinkle the skin of the chin and protrudes the lower lip
Mentalis
Large superficial muscle on the front of the neck, face and chest. Origin is skin superficial to the clavicle and shoulder, insertion is the mandible and muscles of the mouth. Action is to raise the skin of the neck, lowers the corner of the mouth
Platysma
