Axial Muscles (2) Flashcards
Orbicularis oculi
Closes the eye
Frontalis
Wrinkles skin of forehead
Procerus
Wrinkles skin in bridge of nose
Orbicularis Oris
Purses lips
Levator labii superioris
Raises upper lip
Zygomaticus major
Raises corner of mouth
Zygomaticus minor
Helps raise the upper lips
Depressor labii inferioris
Depresses lower lip
Depressor anguli oris
Depresses corner of the mouth
Mentalis
Curls lower lip
Buccinator
Tenses cheeks
Platysma
Tenses skin of neck
Movements of the mandible include…
Elevation - raise mandible/close mouth
Depression- open mouth/ lower mandible
Protraction- move mandible anteriorly
Retraction-move mandible posteriorly
Muscles of mastication are…
Temporalis, masseter, medial pterygoid, and lateral pterygoid
What is the temporalis?
Orgin- temporal fossa (side of skull)
Insertion- coronoid process of mandible
Function- elevates/retracts mandible
What’s the masseter?
Orgin- zygomatic arch
Insertion- lateral surface of mandible/angle
Function- elevates mandible
What’s the medial pterygoid?
Orgin- lateral pterygoid plate
Insertion- angle of mandible
Function- elevates mandible
Lateral ptyeroid orgin, insertion, and function
Orgin- lateral pterygoid plate
Insertion- neck of mandibular condyle
Action- protracts mandible
What muscles elevate the mandible and protract mandible?
Temporalis, masseter, medial pterygoid
protracts - lateral pterygoid
How many phases are in swallowing
3
Phase one of swallowing?
Tongue presses food against palate
Phase two of swallowing?
Larynx and pharynx elevate and receive food
Larynx
Voice box
Pharynx
Throat
Phase 3 of swallowing?
Larynx and pharynx lower again to re-set the position and move food into the esophagus
Muscles of the neck include….
Sternocleomastoid, sternohyoid, sternotyroid, digastric, and mylohyoid
Smiling without teeth
Zygomaticus major
Duck face
Orbicularis oris
Do the teeth show in the depressor anguli
No
Sad face, puffing out lower lip
Mentalis
Mastication means
Chewing
What muscle in the neck isn’t involved in swallowing
Sternocleomastoid
Platsyma means
Flat