QUIZ 4 TMJ Flashcards Preview

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Flashcards in QUIZ 4 TMJ Deck (45)
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1

do fibrous joints permit a lot of movement?

no, they generally permit very little movement

2

what are exmples of fibrous joints?

  • sutures in the skull
  • tooth socket - gomphosis
  • syndesmosis - immovable connective tissue holding bones together (ex. the tibia and fibula)

3

do cartilagenous joints permit a lot of movement?

no, they generally permit very little movement (like fibrous joints)

4

what are examples of cartilagenous joints?

  • primary cartilagenous joints 
  • secondary cartilagenous joints

5

what are primary cartilagenous joints?

  • synchondroses
  • bone and cartilage in direct apposition
  • ex. sternocostal junction

6

what are secondary cartilagenous joints?

  • symphyses
  • fibrous tissue internally in the joint

7

___ joints consist of a capsule filled with fluid contained in a membrane

  • synovial
  • *synovial fluid in a synovial membrane

8

movement of bones relative to one another, facilitated by muscle, take place in ___ capsules in ___ joints

  • articular capsule (fibrous capsule + synovial membrane)
  • synovial

9

how are types of synovial joints classified?

based on how many axes they can move along and also by the shapes of their articular surfaces

10

the TMJ is a ___ joint

synovial sliding-ginglymoid

11

the TMJ articulation is composed of the ___ of the mandible and the ___ of the skull, which is indented on the underside of the ___ bone

  • condyle
  • glenoid fossa
  • temporal

12

what types of movements does the TMJ need to produce?

protrusive, extrusive, and retrusive movements

13

the ___ provides a track that the condyle slides along.  theis is bounded anteriorly by the ___, which the condyle moves in front of when the jaw opens

  • glenoid fossa
  • articular eminence

14

the condyle is able to ___ and ___ in various ways

rotate and translate

15

is the articular disk a distinct structure?

no, it is an extension of the synovial capsule

16

the synovial cavity is divided into two compartments. describe this.

  • the compartments are divided by the articular disk
  • upper joint cavity - adjacent to the glenoid fossa
  • lower joint cavity - adjacent to the condyle

17

the articular disk runs between and attaches the ___ and ___, enveloping the joint

condyle and glenoid fossa

18

the mandible is formed by ___ ossification

intramembranous ossification

19

the mandible is associated with ___ cartilage

meckel's

20

meckel's cartilage forms the ___ directly and articulates with the ___.  this forms a primitive, or primary joint, before the deveopment of the ___ and ___.

  • malleous
  • incus
  • condyle
  • tempral bone

21

the articulation between the temporal bone and the condyle forms the ___

TMJ - this is the secondary joint

22

the articular surfaces of the TMJ are covered with a ___, as opposed to ___

  • fibrous connective tissue
  • hyaline cartilage

23

what is the fibrous covering of the condyle called?

lamina splendens

24

what is the lamina splendens?

  • fibrous covering of the condyle that is a layer of mostly avascular type I collagen with some fibroblasts scattered around

25

the glenoid fossa is covered by a ___ layer attached directly to the ___, while the articular eminence is overalid by a ___ layer

  • thin fibrous
  • temporal bone
  • much thicker fibrous

26

is there cartilage associated with the articular surfaces of the joint proper?

no - it is fibrous connective tissue

27

where is cartilage found?

deeper into the condyle and the articular eminence

28

the layers of cartilage found deep in the condyle and the articular eminence have a layer of progenitor cells which spawn ___ in a proliferative layer, which in turn secrete ECM containing type ___ collagen around themselves

  • chondroblasts
  • II

29

cartilage has what type of collagen?

II

30

the joint capsule forms the ___ that the joint is located within

dense collagenous sac