Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
25 Cards in this Set
- Front
- Back
|
Medial Pterygoid action
|
Synergist of temporalis and masseter muscles in elevation of the mandible; acts with the lateral pterygoid muscle to promote side-to-side grinding movements
|
|
|
Medial Pterygoid innervation
|
Trigeminal nerve
|
|
|
Masseter origin and insertion
|
origin: Zygomatic arch; insertion: Angle and ramus of mandible
|
|
|
Temporalis action
|
Closes jaw; elevates and retracts mandible; maintains position of the mandible at rest
|
|
|
Temporalis innervation
|
Trigeminal nerve
|
|
|
Platysma origin and insertion
|
origin: Fascia of chest (over pectoral muscles and deltoid); insertion: Lower margin of mandible and skin and muscle at corner of mouth
|
|
|
Masseter action
|
Prime mover of jaw closure; elevates mandible
|
|
|
Masseter innervation
|
Trigeminal nerve
|
|
|
Buccinator origin and insertion
|
origin: Molar region of maxilla and mandible; insertion: Orbicularis oris
|
|
|
Platysma action
|
Helps depress mandible; pulls lower lip back and down, i.e., produces downward sag of mouth; tenses skin of neck (e.g., during shaving)
|
|
|
Platysma innervation
|
Facial nerve
|
|
|
Mentalis origin and insertion
|
origin: Mandible below incisors; insertion: Skin of chin
|
|
|
Buccinator action
|
Draws corner of mouth laterally; compresses cheek (as in whistling and sucking); holds food between teeth during chewing; well developed during nursing infants
|
|
|
Buccinator innervation
|
Facial nerve
|
|
|
Orbicularis Oris origin and insertion
|
origin: Arises indirectly from maxilla and mandible; fibers blended with fibers of other facial muscles associated with the lips; insertion: Encircles mouth; inserts into muscle and skin at angles of mouth
|
|
|
Mentalis action
|
Protrudes lower lip; wrinkles chin
|
|
|
Mentalis innervation
|
Facial nerve
|
|
|
Depressor Anguli Oris origin and insertion
|
origin: Body of mandible below incisors; insertion: Skin and muscle at angle of mouth below insertion of zygomaticus
|
|
|
Orbicularis Oris action
|
Closes lips; purses and protrudes lips (kissing muscle)
|
|
|
Orbicularis Oris innervation
|
Facial nerve
|
|
|
Depressor Labii Inferioris origin and insertion
|
origin: Body of mandible lateral to its midline; insertion: Skin and muscle of lower lip
|
|
|
Depressor Anguli Oris action
|
Zygomaticus antagonist; draws corners of mouth downward and laterally (as in a “tragedy mask” grimace)
|
|
|
Depressor Anguli Oris innervation
|
Facial nerve
|
|
|
Levator Labii Superioris origin and insertion
|
origin: Zygomatic bone and infraorbital margin of maxilla; insertion: Skin and muscle of upper lip
|
|
|
Depressor Labii Inferioris action
|
Draws lower lip downward (as in a pout)
|
