Medical Therapeutics Ms Taylor Did You know Muscles in and around your mouth facilitate the mastication or chewing process deglution swallowing mastication chewing origin muscle attachment site on the bone ID: 572795
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Slide1
Muscles of Mastication
Medical Therapeutics
Ms. TaylorSlide2
Did You know…..Muscles in and around your mouth facilitate the mastication or chewing process.Slide3
deglution: swallowingmastication: chewingorigin: muscle attachment site on the boneinsertion: the muscle attachment site that has the greatest amount of movement during contraction
action: the description of movement of the musclepalpate: to feel or touch with fingers or hands
Bilateral: both side or equally affecting both sidesprotrude: to extend in an outwards or forward motionlateral: the side of the body or a body part that is farther from the middle or center of the body
GlossarySlide4Slide5
MasseterTemporalMedial Ptyergoid
Lateral PTyergoid
There are four main muscles to help you masticate (chew) They work together to move the mandible.Slide6
The masseter is the most powerful palpable muscle of the mouth.Insertion: superficial head inserts on lateral surface of the angle and the deep head inserts on ramus above the angle
Masseter. Action: bilateral contraction elevates mandible, clenches teethSlide7
Temporal Origin: temporal fossa. Insertion: anterior border of coronoid process and anterior border of ramus. Temporal
Action: elevate mandible, retract mandibleSlide8
Medial pterygoid Action: elevates mandible, protracts
and opens the mandible
Origin: pterygoid fossa on medial surface of lateral pterygoid plate. Insertion: medial surface of angle of mandible. Slide9
Insertion: anterior surface of neck of mandibular condyle.
Lateral pterygoid Action: inferior portion depresses mandible, its main action is when both muscles contract bringing the lower jaw forward. If only one lateral pterygoid muscle contracted, lower jaw shifts to opposite side and it also closes the mandible. Slide10
There are two sets of accessory muscles that aid in mastication.Suprahyoid
and infrahyoid
muscles
suprahyoid muscles help to raise the floor of the mouth, the larynx and the hyoid bone during deglution (swallowing).
infrahyoid muscles help to depress the hyoid bone during swallowing and speech
Accessory muscles
of masticationSlide11
Suprahyoid MusclesSlide12
Infrahyoid musclesSlide13Slide14
Obicularis Oris: encircles the mouth, allows the lips to control most movements of the lips.
Mentalis: raises the chin and pushes up the lower lip
Platysmus: lowers the bottom lip and pulls the angle of the chin down and to the side
buccinator
:
compresses
the cheek against the teeth and
retracts
the angle of the mouthSlide15Slide16Slide17Slide18
Dorsal surface of tongueSlide19
Enlarged papillaeCircumvallate are large and are formed at the base of the tongue. Their primary role are taste.
Filliform are small cone like projections in front of the circumvallate papillaeFungiform These
are flattened papillae found on the top and sides of the tongueFoliate papillae are a series of folds on the sides of the tongue
close to the back of the tongue