Temporomandibular joint

Question 0

What are the joint structures of the TMJ

Answer 0

Head of condylar process of mandible
Articular disc
Mandibular gossamer of temporal bone
Articular tubercle of temporal bone
Joint capsule

Question 1

Mandibular Foramen

Answer 1

Where branches of V3 go in

Question 2

What nerve inner sets the opening And closing of the jaw

Answer 2

CN5 V3, supplies anterior digastric, mylohyoid,

Question 3

Temporalis Muscle

Answer 3

O- temporal fossa & temporal fascia
I- coronoid process of mandible & anterior surface of ramus
N- anterior & posterior deep temporal nerves from Mandibular division of CN 5
A- elevates the mandible; retracts the mandible (posterior fibers)

Question 4

Masseter

Answer 4

P- inferior border of medial surface of zygomatic arch

D- lateral surface of ramus and it’s coronoid process

N- CN5 (V3)

A- elevates and protrudes mandible

Question 5

Medial Pterygoid

Answer 5

P- medial surface of lateral pterygoid plat, palatine bone, pterygoid fossa

D- medial surface of mandibular ramus

N- CN5 (V3)

A- BILATERAL- elevates mandible, closes jaw, protrude mandible
UNILATERAL- can laterally deviate jaw to opposite sides (grinding)

Question 6

Lateral Pterygoid

Answer 6

P- superior head: greater wing of sphenoid bone
Inferior head: lateral surface of lateral of lateral pterygoid

D- superior head: capsule & Articular disk of the temporomandibular joint, inferior head: neck of mandible

N: lateral pterygoid branch of mandibular division of V

A: protracted mandible, opens mouth, active in grinding