TMJ

Question 1

movements of the TMJ (5)

Answer 1

elevation
depression
protraction
retraction
lateral deviation

Question 2

what type of joint is the TMJ

Answer 2

synovial
diarthrosis
uniaxial
hinge
condyloid

upper - plane
lower - hinge

Question 3

TMJ articular surface contains:

Answer 3

articular disc
articular tubercle
mandibular fossa
mandibular condyle

Question 4

Temporalis

O/I/A

Answer 4

O:temporal fossa
I: coronoid process & ramus of mandible
A: CLOSES jaw, elevates mandible

Question 5

what nerve innervates the muscles of mastication

Answer 5

TRIGEMINAL

Question 6

what are the 4 muscles of mastication

Answer 6

temporalis
masseter
medial pterygoid
lateral pterygoid

Question 7

masseter

O/I/A

Answer 7

O: superficial: zygomatic process of maxilla, zygomatic arch
I: angle & ramus of mandible

O:profundus: zygomatic arch
I: coronoid process of mandible

A: CLOSES jaw, elevation/retraction/protraction, clench teeth

Question 8

medial pterygoid
O/I/A

Answer 8

O: lateral pterygoid plate, process of palatine bone, maxillary tuberosity
I:surface of ramus, angle of mandible
A: CLOSE JAW, elevate/protract mandible

Question 9

lateral pterygoid
O:I:A

Answer 9

O: superior head:greater wing of sphenoid
inferior head: lateral pterygoid
I: condyle of mandible, articular disc of TMJ
A: OPENS jaw (depression), protrude mandible, lateral deviation