CHAPTER 13- TEMPOROMANDIBULAR JOINT (practice) (@hemorrhoids1)

Which of the following best describes the synovial membrane ?

A THIN layer of synovial cells

The lateral pterygoid muscle does which of the following ?

PROTRUDES the mandible and pulls the articular disk forward

Which of the following is not a function of the tmj ?

A speech

B deglutition

C respiration

D mastication

C

A mature mandibular condyle exhibits which characteristic?

bone covers head of condyle

The articular fossa undergoes which developmental change ?

A deepens and expands

B becomes brittle and narrow

C loses flexibility and perforated

D becomes increasingly scalloped in shape

A

Where is the temporomandibular fossa located?

At the POSTERIOR medial aspect of the zygomatic arch.

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

SUPPORTS the joint and limited excursions of the condyles to a normal range

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

A stylohoid

B stylomandibular

C sphenomandibular

D tempomandibular

C

Which ligament attaches to the lateral part of the disk ?

A stylohoid

B stylomandibular

C sphenomandibular

D tempomandibular

D

Which of the following ligaments do not support tmj

A stylohoid

B stylomandibular

C sphenomandibular

D tempomandibular

A

Which of the following is a function of the lateral ligament of the tmj ?

SUPPORTS the joints and limits excursions of the condyles to a normal range

Which feature of tmj helps it withstand functional stress

PRESENCE of cartilage on the condyle and fossa.

When the mouth opens each condylar head slides along the articular

A pad

B fossa

C plane

D eminence

C

A mature mandibular condyle is which shape?

A ovoid

B circular

C crescent

D triangular

A

The synovial membrane is associated with numerous capillaries and ____

A fluids

B bones

C ligaments

D lymphatics

D

Articular remodeling is a response to ____.

A aging

B inactivity

C genetic dysfunction

D environmental stress

D

At birth the heads of the mandibular condyles are round and covered with a think layer of

A bone

B cartilage

C fibrous connective tissue

D elastic connective tissue

B

The upper compartment of the temporomandibular cavity is bound superiorly by the articular fossa and inferiority by the

A head of the mandibular condyle

B articular disk

C articular eminence

D temporal bone

B

The spine of the bone arising from the rim of the mandibular foramen is called?

A mental foremen

B genial tubercles

C submandibluar fossa

D lingula

D

Two movements of tmj are

A gliding and hinge

B superior and inferior

C medial and lateral

D anterior and posterior

A

Which of the following types of nerve endings found in tmj is a pressure receptor

A Pacinian nerve endings

B Ruffni nerve endings

C meissner nerve endings

D free nerve endings

A

Each of the following is a branch of the mand division of the trigeminal nerve that supplies the tmj EXCEPT one, which one ?

A auriculotemporal nerve

B deep temporal nerve

C masseteric nerve

D inferior alveolar nerve

D

Which of the four muscles of mastication protracts the mandible?

A medial pterygoid muscle

B lateral pterygoid muscle

C master muscle

D temporalis muscle

B

T/F: More blood vessels innervate the lateral and medial surfaces of the articular disk than the anterior and posterior areas?

False

T/F: At birth, condylar heads are round and covered with a thick layer of cartilage?

True

T/F: Chondroblasts of the mandibular condyles are organized in long rows?

False

T/F: The action of the lower half of the tmj is gliding?

False

T/F: The articular disk is thin but highly vascular?

False

T/F: Cartilage bone remodeling is not possible?

False

T/F: Every individual has 8 muscles of mastication?

True