Deep Face 2

Question 1

The muscles of mastication originate from?

Answer 1

First branchial arch

Question 2

The muscles of mastication are innervated by?

Answer 2

Mandibular division of Trigeminal nerve, V3

Question 3

During grinding and chewing (lateral displacement) which muscles move ipsilateral and which ones move contralateral?

Answer 3

Ipsilateral: Masseter and Temporalis mm.

Contralateral: Medial and Lateral pterygoid mm.

Question 4

T or F:

The muscles of mastication act all at once?

Answer 4

False: they act in a series.

Question 5

T or F:

Grinding teeth (bruxism) can cause TMJ dysfunction?

Answer 5

True

Question 6

Which muscle of mastication is the most acting muscle in protraction? Which muscle assists?

Answer 6

Lateral Pterygoid; Medial Pterygoid

Question 7

Which muscle of mastication is the most acting muscle in retraction?

Answer 7

Posterior fibers of Temporalis and Deep fibers of Masseter

Question 8

Which muscle of mastication is the most acting muscle in elevation?

Answer 8

Temporalis, Masseter and Medial Pterygoid

Question 9

Which muscle of mastication is the most acting muscle in Depression?

Answer 9

Lateral pterygoid, Digastric (anterior belly), Mylohyoid, Geniohyod, infrahyoid and GRAVITY!!

Question 10

What bony landmarks make up TMJ?

Answer 10

Mandible
Zygomatic bone
Maxilla
Sphenoid bone
Temporal bone (squamous and tympanic parts)
Frontal bone

Question 11

Which fossa receives the head of the MANDIBLE to create TMJ?

Answer 11

Mandibular

Question 12

TMJ Articular disc is made of?

Answer 12

Biconcave made of Fibrocartilage

Question 13

Which muscles inserts at the TMJ Articular disc?

Answer 13

Lateral Pterygoid m (superior head)

Question 14

The TMJ Dis divides the joint into?

Answer 14

Suprameniscal and Inframeniscal compartments

Question 15

What movements are associated with TMJ?

Answer 15

Elevation/Depression (inframeniscal compartment)

Protrusion/Retraction (suprameniscal compartment)

Question 16

The ____ ____ of the joint capsule encloses the temporomandibular joint complex, and is attached to the articular disc.

Answer 16

fibrous membrane

Question 17

The ligaments of the TMJ function to help ____ the movement of the joint, but they __ __ ____ it or prevent excessive movement due to force.

Answer 17

limit; DO NOT STABALIZE

Question 18

Name the ligaments of TMJ

Answer 18

Tempromandibular (lateral ligament)
Stylomandibular
Sphenomandibular