Head and Neck 2

Question 1

temperomandibular joint

Answer 1

synovial joint between the condoyle of the mandible and the mandibular fossa (cavity) of the temporal bone

Question 2

what is unique about the TMJ

Answer 2

it has an articular disc (fibrocartiage) that acts as a cushion between the two bones

Question 3

where does the articular disc attach to

Answer 3

anteriorly to the lateral pterygoid muscle (responsible for opening mouth - moving mandible down)
posteriorly to retrodiscal tissue

Question 4

mandible

Answer 4

one bone formed by the union of two halves (horizontal body and vertical ramus on both sides)

Question 5

‘angle’ of the mandible

Answer 5

refers to the point where the ramus and body meet

Question 6

what are the two processes on the mandible ramus

Answer 6

condoyle (TMJ)

coronoid proces

Question 7

mandibular foramen

Answer 7

small hole where the mandibular nerve (CN V3) and some blood vessels pass through

Question 8

mandibular fossa

Answer 8

cavity in temporal bone that allows interaction with the mandible condoyle

Question 9

what is the TMJ surrounded by

Answer 9

a dense fibrous membrane called a capsule

Question 10

mental foramen

Answer 10

hole in body of mandible where a branch of the mandibular nerve (CN V3) passes through

Question 11

what is the most common TMJ injury

Answer 11

forward dislocation

Question 12

what are the 4 muscles of mastication

Answer 12

masseter
temporalis
medial pterygoid
lateral pterygoid

Question 13

medial pterygoid

Answer 13

elevates and protrudes the mandible

attaches to the angle

Question 14

lateral pterygoid

Answer 14

only muscle that moves mandible down (depresses and protrudeS)
attaches at neck of mandible and capsule

Question 15

temporalis muscle

Answer 15

broad fan shape muscle
attaches to the coronoid process of the mandible
elevates/ lifts mandible

Question 16

masseter muscle

Answer 16

deep and superficial parts
deep part attaches to ramus, superficial attaches to angle
helps bite/ chew / pull mandible up

Question 17

orbicularis oris

Answer 17

facial muscle controlling movement of mouth and lips (encircles opening of mouth)
‘kissing muscle’

Question 18

buccinator

Answer 18

holds cheek to teeth and aids chewing

on side of face in between maxilla and mandible

Question 19

when is the TMJ most stable

Answer 19

when mandible is elevated, teeth are occluded and condoyle is in mandibular fossa