Deck 6: The Temporomandibular Joint

Question 1

Retrusion of the temporomandibular joint (TMJ)is primarily limited by the:

A) Horizontal portion of the temporomandibular ligament
B) Stylomandibular ligament
C) Anterior portion of the temporomandibular joint capsule

Answer 1

A

Question 2

Which of the following muscles is considered to be a prime mover for mandibular lateral deviation to the right?

A) Right masseter
B) Right medial and lateral pterygoid
C) Left medial and lateral pterygoid
D) Left temporalis

Answer 2

C

Question 3

Contraction of which muscle will pull the articular disc anteriorly during mouth opening?

A) Medial pterygoid
B) Lateral pterygoid
C) Digastric
D) Temporalis

Answer 3

B

Question 4

With which of the following pathological conditions will the patient experience joint noise at two different intervals during mandibular depression and elevation?

A) Disc displacement
B) Capsulitis
C) Joint hypermobility
D) Capsular fibrosis

Question 5

The first phase of mandibular depression occurs in the ________________joint and consists of anterior ________________of the condylar head.

A) upper,rotation
B) lower,rotation
C) upper,translation
D) lower,translation

Question 6

The articular disc of the TMJ is attached laterally to the ________________and anteriorly to the ____________________.

A) fibrous capsule,mandibular condyle
B) articular eminence,mandibular condyle
C) mandibular condyle,fibrous capsule
D) fibrous capsule,articular eminence

Question 7

What is the significance of a "reciprocal click"?

Question 8

Which of the following is true concerning the structure of the temporomandibular joint (TMJ)?

A) The lower joint is formed by the articulation of the articular eminence of the mandible with the superior surface of the disc.
B) The upper joint is formed by the articulation of the anterior surface of the condyle with the posterior surface of the disc.
C) The lower joint is formed by the superior surface of the disc and the posterior surface of the condyle.
D) The upper joint is formed by the articulation of the articular eminence of the temporal bone and the superior surface of the disc.

Question 9

Describe the attachments of the articular disc of the temporomandibular joint (TMJ).

Question 10

Which of the following muscles is considered to be a prime mover for mandibular depression against resistance?

A) Digastric
B) Bilateral medial pterygoid
C) Masseter
D) Temporalis

Question 11

Describe the articulations and functions of the upper and lower joint spaces.

Question 12

Which of the following muscles may become shortened when the posterior suboccipital muscles become tight as a result of a forward head posture?

A) Medial pterygoid
B) Lateral pterygoid
C) Temporalis
D) Posterior belly of the digastic
True/False
Indicate whether the statement is true or false.

Question 13

During normal mandibular lateral deviation to the left,the left condylar head ____________________,and the right condylar head and disc ____________________.

A) glides posteriorly and superiorly,spins
B) glides anteriorly and inferiorly,spins
C) spins,glides posteriorly and superiorly
D) spins,glides anteriorly and inferiorly

Question 14

During normal mandibular lateral deviation to the left,the left condylar head moves in this manner.

A) Gliding posteriorly and superiorly
B) Gliding anteriorly and inferiorly
C) Spinning posteriorly
D) Spinning anteriorly

Question 15

Biting down on the left side of the mouth promotes unloading of the right temporomandibular joint (TMJ).

Question 16

Upon examination of your patient's temporomandibular joint (TMJs),you observe the following amount of active range of motion (AROM): opening 55 mm; (L)lateral deviation 8 mm; (R)lateral deviation 8 mm; and protrusion 12 mm.Based on your knowledge of normal values of AROM of the TMJ,you would conclude that there is:

A) Less than expected opening and protrusion
B) Less than expected lateral deviation bilaterally
C) Greater than expected opening and protrusion
D) Excessive motion in all directions

Question 17

Which of the following statements is true concerning the functions of the posterior bilaminar retrodiscal pad during normal temporomandibular joint (TMJ)osteokinematics?

A) The elastic superior lamina allows disc translation anteriorly along the articular eminence during mandibular depression.
B) The elastic inferior lamina serves to enhance disc motion during mandibular depression.
C) The superior lamina is inelastic and serves to tether the disc from forward translation.

Question 18

What is the relationship of the temporomandibular joint (TMJ)with the cervical spine?