Deck 13: Temporomandibular Joint

Question 1

The articular fossa undergoes which developmental change?

A) Deepens and expands
B) Becomes brittle and narrow
C) Loses flexibility and perforates
D) Becomes increasingly scalloped in shape

Answer 1

Deepens and expands

Question 2

Which of the following is not a function of the temporomandibular joint (TMJ)?

A) Speech
B) Deglutition
C) Respiration
D) Mastication

Answer 2

Respiration

Question 3

The lateral pterygoid muscle does which of the following?

A) Retracts the mandible
B) Protracts and elevates the mandible
C) Elevates the mandible and clenches the teeth
D) Protrudes the mandible and pulls the articular disk forward

Answer 3

Protrudes the mandible and pulls the articular disk forward

Question 4

The synovial membrane is associated with numerous capillaries and _________.

A) fluids
B) bones
C) ligaments
D) lymphatics

Question 5

Articular remodeling is a response to _______________.

A) aging
B) inactivity
C) genetic dysfunction
D) environmental stress

Question 6

Which of the following ligaments do not support the temporomandibular joint?

A) Stylohyoid
B) Stylomandibular
C) Sphenomandibular
D) Temporomandibular

Question 7

Which feature of the TMJ helps it withstand functional stress?

A) Presence of cartilage on the condyle and fossa
B) Encapsulated nerve terminals in the synovial folds
C) Functional relationship with the muscles of mastication
D) Network of blood vessels in the posterior region of the joint

Question 8

Chondroblasts of the mandibular condyles are organized in long rows.

Question 9

The heads of mandibular condyles form secondary ossification centers.Secondary ossification centers produce epiphyseal lines (cartilage-bone junctions).

A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second is false.
D) The first statement is false; the second is true.

Question 10

Where is the temporomandibular fossa located?

A) Medial to the zygomaticofrontal suture
B) Within the periphery of the zygomatic arch
C) At the posterior medial aspect of the zygomatic arch
D) Along the anterior upper border of the zygomatic arch

Question 11

At birth,condylar heads are round and covered with a thick layer of cartilage.

Question 12

Which of the following is a function of the temporomandibular joint capsule?

A) Provides joint lubrication
B) Supports articulatory movements
C) Encloses the lateral, medial, and posterior boundaries
D) Keeps the disk immobile when the head of the condyle moves

Question 13

A mature mandibular condyle is which shape?

A) Ovoid
B) Circular
C) Crescent
D) Triangular

Question 14

When the mouth opens,each condylar head slides along the articular ________.

A) pad
B) fossa
C) plane
D) eminence

Question 15

Which ligament attaches to the lateral part of the disk?

A) Stylohyoid
B) Stylomandibular
C) Sphenomandibular
D) Temporomandibular

Question 16

Which of the following is a function of the lateral ligament of the temporomandibular joint?

A) Operates in retraction of the disk
B) Strengthens the capsule and allows freedom of condylar movement
C) Provides strong insulation between the condylar heads and articular surfaces
D) Supports the joint and limits excursions of the condyles to a normal range

Question 17

Which ligament extends down the medial side of the ramus to insert on the lingula?

A) Stylohyoid
B) Stylomandibular
C) Sphenomandibular
D) Temporomandibular

Question 18

Which of the following best describes the synovial membrane?

A) Thin layer of synovial cells
B) Sterile, highly viscous fluid
C) Dense, collagenous fibrous pad
D) Fibrous capsule that encloses the temporomandibular joint

Question 19

A mature mandibular condyle exhibits which characteristic?

A) The condylar head is a round shape.
B) Bone covers the head of the condyle.
C) A thick layer of cartilage covers the head of the condyle.
D) Spikes of porous cartilage project into the underlying bone marrow.

Question 20

More blood vessels innervate the lateral and medial surfaces of the articular disk than the anterior and posterior areas.

Question 21

Cartilage-bone remodeling is not possible.

Question 22

The ___________ compartment of the temporomandibular cavity is bound superiorly by the articular fossa and inferiorly by the disk.

Question 23

Which branches of the trigeminal nerve innervate the TMJ?

Question 24

The postnatal condylar head is a thick band of ___________.

Question 25

Every individual has eight muscles of mastication.

Question 26

Identify the four muscles of mastication.

Question 27

The action of the lower half of the TMJ is a gliding motion.

Question 28

Name the two movements of the TMJ.

Question 29

The articular disk is thin but highly vascular.

Question 30

Name the four types of nerve endings in the TMJ.

Question 31

The _________ is a spine of bone arising from the rim of the mandibular foramen.

Question 32

No epiphyseal line is found in the TMJ condyle.