Exam 4 Pt. 5 Flashcards
muscles of face
orbicularis oris, risorius, buccinator,
orbicularis oris
f - constricts oral opening
o - corner of lips
i - opposite corner of lips
risorius
f - retracts lips at the corners
o - posterior region of the face along the fascia of the masseter
i - orbicularis oris at corners of mouth
buccinator
f - moves food onto the grinding surfaces of the molars, and constricts oropharynx
o - pterygomadibular ligament
i - orbicularis oris at corners of mouth
muscles of face elevators
levator labii superioris, zygomatic minor, levator labii superioris alaeque nasi, levator anguli oris, zygomatic major
levator labii superioris
f - elevate upper lip
o - infraorbital margin of the maxilla
i - mid-lateral region of the upper lip
zygomatic minor
f - elevates upper lip
o - facial surface of the zygomatic bone
i - mid-lateral region of the upper lip
levator labii superioris alaeque nasi
f - elevates upper lip
o - frontal process of the maxilla
i - mid-lateral region of the upper lip
levator anguli oris
f - draws corner of mouth up and medially
o - canine fossa of maxilla
i - corners of the upper and lower lip
zygomatic major
f - elevates and retracts angle of mouth
o - lateral to the zygomatic minor on the zygomatic bone
i - corner of the obicularis oris
depressor labii inferioris
f - dilates orifice by pulling lip down and out
o - mandible at the oblique line
i - lower lip
depressor anguli oris
f - depresses corner of mouth and helps to compress upper lip against lower lip
o - lateral margins of mandible on the oblique line
i - orbuclaris oris and the upper lip at corner
mentalis
f - elevates and wrinkles chin and pulls lower lip out
o - region of the incisive fossa of the mandible
i - skin of the chin below
platysma
f - depresses mandible
o - fascia overlying pectoralis major and deltoid
i - corner of mouth, region below the symphysis mente, lower margin of the mandible, and skin near the masseter
