TMJ

Question 1

this is where the condyles meet the temporal bone of the skull

Answer 1

TMJ

Question 2

is a fibrous disc that cushions the space between the two bones in TMJ

Answer 2

articular disk

Question 3

movement - opening of the mouth

Answer 3

depression

Question 4

movement - closing the mouth

Answer 4

elevation

Question 5

movement - protraction of chin

Answer 5

protrusion

Question 6

movement - retraction of chin

Answer 6

retrusion

Question 7

movement - side to side movement in chewing or grinding

Answer 7

lateral deviation

Question 8

_____occurs in the lower portion of the joint. The rotational axis passes through the head of the condyle so that there is a hinge type movement occurring

Answer 8

rotation

Question 9

occurs in the upper portion of the joint, and this motion os the condyle and meniscus is relative to the articulator eminence

Answer 9

translation

Question 10

the strongest muscle of mastication

Answer 10

masseter

Question 11

the deep fibers retract the mandible, while the superficial fibers protrude the mandible

Answer 11

masseter

Question 12

a fan-shaped muscle, with 3 parts, occupying the whole temporal fossa

Answer 12

temporalis

Question 13

a muscle that elevates and retracts the lower jaw, and moves it from side-to-side

Answer 13

temporalis

Question 14

what movement is stimulated if the middle portion of temporalis is active?

Answer 14

protrusion movement

Question 15

assists in the elevation and protrusion of the mandible, it acts to laterally deviate the mandible to the opposite side

Answer 15

medial pterygoid

Question 16

a muscle that generates horizontal forces required for producing forward and lateral motions

Answer 16

lateral pterygoid

Question 17

depresses the mandible when assisted by the anterior belly of the digastric and mylohyoid muscle

Answer 17

lateral pterygoid

Question 18

prime mover of muscle when jaw is opened (depression)

Answer 18

lateral pterygoid

Question 19

muscles that contribute against resistance in jaw opening

Answer 19

digastric
geniohyoid
mylohyoid

Question 20

strongest muscle movenent activity in protrusion

Answer 20

lateral pterygoid and medial pterygoid

Question 21

a muscle that is active when retrusion

Answer 21

temporalis muscle

Question 22

posterior fibers of temporalis, digastric, mylohyoid and geniohyoid act in unison

Answer 22

ipsilateral (lateral deviation)

Question 23

prime movers are lateral and medial pterygoids

Answer 23

contralateral (lateral deviation)

Question 24

what type of joint does TMJ consists

Answer 24

synovial joint

Question 25

The squamous portion of the temporal bone

Answer 25

glenoid fossa

Question 26

Transverse bony bar that forms the root of zygomatic process

Answer 26

articular eminence

Question 27

stabilize the condyle within TMJ aid lubrication of the joint by strong fluid squeezed out from loaded area

Answer 27

articular disc

Question 28

superior compartment of articular disc allows ___ movement

Answer 28

translational movement

Question 29

types of translational movement

Answer 29

protrusion retrusion lateral deviation

Question 30

inferior compartment of the articular disc allows ___ movement

Answer 30

rotational movement

Question 31

types of rotational movement

Answer 31

depression elevation

Question 32

blood supply of TMJ

Answer 32

ARTERIES ● Deep auricular artery ● Superficial temporal artery ● Anterior tympanic artery VEINS ● Superficial temporal vein ● Maxillary vein

Question 33

innervation of tmj

Answer 33

auriculotemporal branch (CN V mandi branch) masseteric and deep temporal nerve

Question 34

major ligament of TMJ

Answer 34

lateral temporomandibular ligament

Question 35

minor ligament in TMJ

Answer 35

stylomandibular and sphenomandibular ligament