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muscles of facial expression-oral group
oral grp: origion, insertion,actions, innervation
47
Anatomy
Graduate
04/11/2010

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Cards

Term
what is the origin of the orbicularis oris
Definition

the nasal septum; the maxilla, and the mandible

and the angle of the mouth

Term
what is the insertion of the orbicularis oris?
Definition
the dermis of the lips and surrounding muscles
Term
what is the action of the orbicularis oris
Definition

close mouth

protrusion of the lips

pursing of the lips

Term
what are the muscles of facial expression in the oral group
Definition

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

Term
what is the innervation of the orbicularis oris
Definition
buccal and mandibular branches of the VII
Term
what is the origin of the depressor anguli oris
Definition
oblique line of the mandible
Term
what is the insertion of the depressor anguli oris
Definition
corner of the mouth
Term
what is the action of the depressor anguli oris
Definition

depresses the corners of the mouth

antagonizes the levator anguli oris 

Term
what is the innervation of the depressor anguli oris
Definition
mandibular branch of VII
Term
what is the origin of the levator anguli oris
Definition
canine fossa of the maxilla
Term
what is the insertion point of the levator anguli oris
Definition
the corner of the mouth
Term
what is the innervation of the levator anguli oris
Definition
buccal branch of VII
Term
what is he action of the levator anguli oris
Definition
elevates the angle of the mouth
Term
what is the origin of the zygomaticus major
Definition
the temporal process of the zygomatic bone
Term
what is the insertion point of the zygomaticus major
Definition
corner of the mouth
Term
what is the action of the zygomaticus major?
Definition
helps elevate the upper lip
Term
what is the innervation of the zygomaticus major
Definition
buccal branches of VII
Term
what muscle is called the "laughing muscle?"
Definition
the zygomaticus major
Term
what is the origin of the zygomaticus minor
Definition
the maxillary process of the zygomatic bone
Term
what is the insertion point of the zygomaticus minor
Definition
lateral upper lip (medial to the corner of the lip)
Term
what is the action of the zygomaticus minor
Definition
helps elevate the upper lip
Term
what is the innervation of the zygomaticus minor
Definition
buccal branch of VII
Term
what is the origin of the levator labii superioris
Definition
maxilla, zygoma, and alar cartilage
Term
what is the insertion ponit for the levator labii superioris
Definition
dermis of the upper lip
Term
what is the action for the levator labii superioris
Definition
elevates the upper lip
Term
what is the innervation of the levator labii superioris
Definition
zygomaticus and buccal branches of the VII
Term
what is the origin of the levator labii superioris alaeque nasi?
Definition
maxilla near bridge of the nose
Term
what is the insertion point of the levator labii superioris alaeque nasi?
Definition
cartilage of nose and lateral upper lip
Term
what is the action of the levator labii superioris alaeque nasi?
Definition

elevate the upper lip

dilate the nostril

Term
what is the innervation for the levator labii superioris alaeque nasi
Definition
zygomatic and buccal branches of VII
Term
what is the origin of the risorius
Definition
fascia overlying the parotid gland
Term
what is the insertion point for the risorius
Definition
angle of the mouth
Term
what is the action of the risorius
Definition
moves angle of the mouth laterally
Term
what is the innervation of the risorius
Definition
buccal branch of VII
Term
what is the origin of the depressor labii inferioris
Definition
the oblqiue line of the mandible
Term
what is the insertion point of the depressor labii inferioris
Definition
the corner of the lip
Term
what is the action of the depressor labii inferioris
Definition
depresses the lower lip
Term
what is the innervation of the depressor labii inferioris?
Definition
mandibular branch of VII
Term
what is the origin of the mentalis
Definition
the incisive fossa of the mandible
Term
what is the insertion point of the mentalis
Definition
middle of the lower lip
Term
what is the action of the mentalis muscle
Definition
mandibular branch of VII
Term
what muscle is the "pouting" muscle
Definition
mentalis muscle
Term
what is the origin of the buccinator
Definition

pterygomandibular raphe

alveolar margins of the maxilla and mandible

Term
what is the insertion point for the buccinator
Definition
the upper and lower lip
Term
what is the action of the buccinator
Definition

keeps bolus between cheek and teeth

helps forcibly expel air or create sucking action

Term
what is the innervation of the buccinator
Definition
buccal branch of the buccinator
Term
what makes the pterygomandibular raphe?
Definition
where the buccinator muscle and the superior pharyngeal constrictor muscle meet
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