4/13/17 TMJ TEST #4

Question 1

What type of joints permit very little movement?

Answer 1

-Fibrous joints

Question 2

What are three examples of fibrous joints?

Answer 2

• Sutures
• Gomphosis
• Syndesmosis

Question 3

What type of joints also permit very little movement?

Answer 3

-Cartilaginous joints

Question 4

What are the two examples of cartilaginous joints?

Answer 4

• Primary

- Secondary

Question 5

Which example of cartilaginous joints are bone and cartilage in direct apposition?

Answer 5

-Primary

Question 6

Which example of cartilaginous joints are fibrous tissues internally in the joint?

Answer 6

-Secondary

Question 7

What type of joints are typically the moving part joints?

Answer 7

-Synovial

Question 8

What does the capsule of a synovial joint consist of?

Answer 8

-Capsule filled with synovial fluid contained in a synovial membrane

Question 9

The TMJ is called what type of joint?

Answer 9

-Synovial sliding-ginglymoid joint

Question 10

What is the TMJ articulation composed of?

Answer 10

• Condyle of the mandible

- Glenoid fossa

Question 11

What is anterior to the condyle on which it slides and moves in front of when the jaw open?

Answer 11

–Articular eminence

Question 12

T/F The condyle can rotate and translate in various ways

Answer 12

True

Question 13

The TMJ is divided into two compartments by what?

Answer 13

-Articular disc

Question 14

T/F The disk is effectively an extension of the synovial capsule, not a distinct structure

Answer 14

True

Question 15

What is found between the glenoid fossa and the condyle?

Answer 15

-Articular disc

Question 16

What ear bone does Meckel’s cartilage form?

Answer 16

-Malleus

Question 17

The malleus articulates with the incus forming what type of joint?

Answer 17

-Primary joint

Question 18

The articulation between the temporal bone and the TMJ forms what type of joint?

Answer 18

-Secondary joint

Question 19

The articular surfaces of the TMJ are covered with what?

Answer 19

-Fibrous connective tissue

Question 20

What is the fibrous covering of the condyle known as?

Answer 20

-Lamina splendens

Question 21

What is the lamina splendens composed of?

Answer 21

-Type I collagen

Question 22

The glenoid fossa is covered by a thin or thick fibrous layer?

Answer 22

-Thin

Question 23

The articular eminence is covered by a thin or thick fibrous layer?

Answer 23

-Thicker

Question 24

Where do you find a cartilage layer in the TMJ?

Answer 24

-Condyle and the Articular eminence

Question 25

What type of collagen do chondrocytes make?

Answer 25

-Type II

Question 26

What process forms the bone on the tip of the condyle?

Answer 26

-Endochondral

Question 27

T/F There is remodeling that can occur in the TMJ because of the chondroblasts/cartilage found in the condyle and articular eminence

Answer 27

True

Question 28

What type of sac is the joint capsule of the TMJ?

Answer 28

-Dense collagenous sac

Question 29

The capsule has thickened regions that branch out to form what?

Answer 29

-Temperomandibular ligament

Question 30

What does the temporomandibular ligament do?

Answer 30

-Restricts lateral and medial movement when the joint articulates

Question 31

What are the three movements that the temporomandibular ligament restricts?

Answer 31

- Medial-lateral - Superior-inferior - Posteriorly

Question 32

What are two other ligaments that limit the inferior movement of the joint when the jaw is open?

Answer 32

- Sphenomandibular ligament | - Stylomandibular ligament

Question 33

T/F The articular disk is a dense fibrous structure

Answer 33

True

Question 34

T/F Posteriorly and anteriorly the articular disk in thinner

Answer 34

False | -Thicker

Question 35

What are the two layer of the synovial membrane?

Answer 35

- Subintima | - Intima

Question 36

Which layer of the synovial membrane is a layer of loose connective tissue that contains elastin fibers and supporting vasculature?

Answer 36

-Subintima

Question 37

What layer of the synovial membrane contains macrophages, adipocytes, fibroblasts, mast cells and is continuous with the fibrous tissue of the capsule?

Answer 37

-Subintima

Question 38

What layer of the synovial membrane is the innermost layer?

Answer 38

-Intima

Question 39

What layer of the synovial membrane contains several layers of synovial cells that are either A cells (resemble macrophages) or B cells (resemble fibroblasts)?

Answer 39

-Intima

Question 40

What is the difference between synovial fluid and blood plasma?

Answer 40

-Synovial fluid contains extra proteins and proteoglycans