Periorial muscles Flashcards
Orbicularis oris
primary muscle of lip movementssuperior and inferior aspectsfree standing bone-no bone attachement
levator labii superior action
raise upper lip
zygomaticus minor action
elevates upper lip
zygomaticus major action
draws angle of mouth upward and outward
levator anguli oris action
raises angle of mouth
mentalis action
raises lower lip, wrinkles of skin of chin, lip compression
depressor labii inferior action
draws lower lip downward and laterally, lowers angle of mouth***origin is below insertion
depressor anguli oris action
draws angle of mouth downward and laterally
buccinator action
compresses cheek against teeth, provides a stable lateral wall for oral pressure development during speech, chewing, and wind instrument sound generation**deep to risorius mm
risorius action
retracts angle of mouth
oral structures are made up of
HARD tissues:
- mandible (lower jaw)
- maxilla (hard palate)
- dentition
SOFT tissues:
- lips
- soft palate
- uvula
- floor of mouth
- faucial arches or tonsil pillars
muscles that form the floor of the mouth:
- mylohyoid
- geniohyoid
- anterior belly of digastric
(all attach to the mandible anteriorly and hyoid bone posteriorly)
fibers of the tongue go in which direction?
ALL directions
- transverse and lateral
how many sections is the tongue divided into and what are they?
2 sections: oral and pharyngeal
Oral section of tongue
(tip, blade, front center and back)
– it begins at the tip and ends at the circumvallate papillae and is under cortical or voluntary neural control
