muscles of mastication :)

Question 1

how is the mandible connected to the skull

Answer 1

synovial joints

Question 2

what is the zygomatic arch or

Answer 2

attachment for masseter

Question 3

parts of the mandible

Answer 3

body
ramus
angle
coronoid process
condylar process (head and neck)

Question 4

what hole is in the body of the mandible

Answer 4

mental foramen

Question 5

what is the coronoid process for

Answer 5

site of attachment to temporalis

Question 6

what is the temporomandibular joint made from

Answer 6

underside of temporal bone

head of condyle

Question 7

what are main parts of the temporal bone that relates to the TMJ

Answer 7

concave glenoid cavity

convex articular eminance

Question 8

when is the joint stable

Answer 8

when the condyle is in the glenoid

Question 9

when is the joint unstable

Answer 9

when the condyl is on the articular eminence

Question 10

how would you depress the mandible

Answer 10

condyle needs to move out of the genie cavity

Question 11

TMJ movments

Answer 11

rotation

sliding

Question 12

how does sliding movements occir

Answer 12

head of condyle moves from glenoid cavity to articular eminance

Question 13

how does rotation occur in the TMJ

Answer 13

through axis of condyle

Question 14

what are the TMJ surfaces covered by

Answer 14

fibrocartilage (Articular disks)

Question 15

how is the joint separated into two cavites

Answer 15

by articular disk

Question 16

what is the articular disk attached to

Answer 16

lateral pterygoid

Question 17

function of articular disc

Answer 17

attaches lateral pterygoid to posterior aspect of joint
stablises joint (pulled forward to pack space when condyle on articular eminence)

Question 18

is the articular disc essential

Answer 18

no

joint will still fuction

Question 19

what causes clicking sound of the joint

Answer 19

disc snaps into position rather than sliding

Question 20

lateral pterygoid

Answer 20

divided into 2 heads (attach)
upper head to disc
lower head to neck of condyle

originates from lateral side of pterygoid plate

Question 21

what is the lateral pterygoid involved in

Answer 21

protrusion of mandible
pulls on neck of condyl out of GC
upper head contracts and pulls AD onto AE

Question 22

main ligament of TMJ

Answer 22

temporomandibular ligament

prevents lateral displacement

Question 23

accessory ligaments of TMJ

Answer 23

stylomandibular

sphenomandibular

Question 24

what do the accessory ligaments do

Answer 24

define range of moment of TMJ

perceive pain

Question 25

how are the right and left TMJs connected

Answer 25

by mandible

Question 26

how many muscles in mastication

Answer 26

4 pairs

Question 27

what are the superficial muscles of mastication

Answer 27

masseter | temporalis

Question 28

what are the deep muscles of mastication

Answer 28

medial and lateral pterygoid

Question 29

what are the muscles of mastication supplied by

Answer 29

motor branches of trigeminal v3

Question 30

what are other muscles involved in movement of mandible

Answer 30

suprahyoid | infrahyoid

Question 31

temporalis

Answer 31

fan shaped | fibres all come together at same place to form tendon

Question 32

what is temporals attached to

Answer 32

lateral aspect of skull | coronoid process of mandible

Question 33

where does temporals inser

Answer 33

anterior border of rams to retromolar fossa

Question 34

what does temporalis do

Answer 34

elevator and retractor of mandible

Question 35

what happens if dentures extend into retromolar fossa

Answer 35

denture displacement

Question 36

masseter function and attatchments

Answer 36

elevator zygomatic arch along lateral aspect of mandibular ramus

Question 37

what is the lateral pterygoid plate for

Answer 37

site of attachment for lateral/medial pterygoid muscles

Question 38

lateral pteryoid function and attachments

Answer 38

protrudes mandible | lateral side of pterygoid plate and neck of condyl

Question 39

medial pterygoid function and attachemnts

Answer 39

elevator | medial side of lateral pteryhoid plate and inner aspect of angle of mandible

Question 40

what muscles elevate the mandible

Answer 40

temporalis masseter medial pterygoid

Question 41

what retracts the mandible

Answer 41

temporalis

Question 42

what protrudes the mandible

Answer 42

lateral pterygoids

Question 43

what can the supra hyoid muscles do

Answer 43

pull down on the mandible by contraction

Question 44

what do buccinator do

Answer 44

push food back into OC

Question 45

what does obicularis oris do

Answer 45

shuts the mouth

Question 46

what is lateral excursion

Answer 46

mandible swings side to side

Question 47

how does lateral excursion occur

Answer 47

when mandible protrudes, lateral pterygoid of other side deviates opposite condyle moved slightly back by temporals

Question 48

what way can the TMJ dislocate

Answer 48

anterioally

Question 49

what prevents other forms of TMJ dislocation

Answer 49

bony ligamentous constraints

Question 50

how does dislocation of TMJ occur

Answer 50

condyle overrides articular eminence

Question 51

how to reset TMJ

Answer 51

downwards backwards pressure on molars | muscle relaxants if muscles gone into spasm

Question 52

what is required for incision

Answer 52

mandible suppressed for size of object | mandible protruded so incised edges meet

Question 53

what is required for mastication

Answer 53

depressed for food to get between molars | deviated laterally to bring molars into cusp contact

Question 54

range of movemtn

Answer 54

extreme when yawning | speech

Question 55

what is most TMJ disfunction due to

Answer 55

over closing and grinding TMJ relies on proprioception from receptors and lateralpterygoid (muscle of mastication )