muscles of facial expression-oral group Flashcards

insertion point
Terms Definitions
what is the origin of the orbicularis oris
the nasal septum; the maxilla, and the mandible
and the angle of the mouth
what is the insertion of the orbicularis oris?
the dermis of the lips and surrounding muscles
what is the action of the orbicularis oris
close mouth
protrusion of the lips
pursing of the lips
what are the muscles of facial expression in the oral group
orbicularis oris-----depressor anguli oris
levator anguli oris-----zygomaticus major
zygomaticus minor-------levator labii superioris
levator labii superioris alaeque-----risorius
depressor labii inferioris-----mentalis
buccinator
what is the innervation of the orbicularis oris
buccal and mandibular branches of the VII
what is the origin of the depressor anguli oris
oblique line of the mandible
what is the insertion of the depressor anguli oris
corner of the mouth
what is the action of the depressor anguli oris
depresses the corners of the mouth
antagonizes the levator anguli oris 
what is the innervation of the depressor anguli oris
mandibular branch of VII
what is the origin of the levator anguli oris
canine fossa of the maxilla
what is the insertion point of the levator anguli oris
the corner of the mouth
what is the innervation of the levator anguli oris
buccal branch of VII
what is he action of the levator anguli oris
elevates the angle of the mouth
what is the origin of the zygomaticus major
the temporal process of the zygomatic bone
what is the insertion point of the zygomaticus major
corner of the mouth
what is the action of the zygomaticus major?
helps elevate the upper lip
what is the innervation of the zygomaticus major
buccal branches of VII
what muscle is called the "laughing muscle?"
the zygomaticus major
what is the origin of the zygomaticus minor
the maxillary process of the zygomatic bone
what is the insertion point of the zygomaticus minor
lateral upper lip (medial to the corner of the lip)
what is the action of the zygomaticus minor
helps elevate the upper lip
what is the innervation of the zygomaticus minor
buccal branch of VII
what is the origin of the levator labii superioris
maxilla, zygoma, and alar cartilage
what is the insertion ponit for the levator labii superioris
dermis of the upper lip
what is the action for the levator labii superioris
elevates the upper lip
what is the innervation of the levator labii superioris
zygomaticus and buccal branches of the VII
what is the origin of the levator labii superioris alaeque nasi?
maxilla near bridge of the nose
what is the insertion point of the levator labii superioris alaeque nasi?
cartilage of nose and lateral upper lip
what is the action of the levator labii superioris alaeque nasi?
elevate the upper lip
dilate the nostril
what is the innervation for the levator labii superioris alaeque nasi
zygomatic and buccal branches of VII
what is the origin of the risorius
fascia overlying the parotid gland
what is the insertion point for the risorius
angle of the mouth
what is the action of the risorius
moves angle of the mouth laterally
what is the innervation of the risorius
buccal branch of VII
what is the origin of the depressor labii inferioris
the oblqiue line of the mandible
what is the insertion point of the depressor labii inferioris
the corner of the lip
what is the action of the depressor labii inferioris
depresses the lower lip
what is the innervation of the depressor labii inferioris?
mandibular branch of VII
what is the origin of the mentalis
the incisive fossa of the mandible
what is the insertion point of the mentalis
middle of the lower lip
what is the action of the mentalis muscle
mandibular branch of VII
what muscle is the "pouting" muscle
mentalis muscle
what is the origin of the buccinator
pterygomandibular raphe
alveolar margins of the maxilla and mandible
what is the insertion point for the buccinator
the upper and lower lip
what is the action of the buccinator
keeps bolus between cheek and teeth
helps forcibly expel air or create sucking action
what is the innervation of the buccinator
buccal branch of the buccinator
what makes the pterygomandibular raphe?
where the buccinator muscle and the superior pharyngeal constrictor muscle meet
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