41. Infratemporal fossa and TMJ

Question 1

Describe the infratemporal fossa

Answer 1

Space between skull and ramus of mandible

Question 2

Anterior boundary of infratemporal fossa?

Answer 2

Posterior surface of maxilla

Question 3

Posterior boundary of infratemporal fossa?

Answer 3

Styloid process

Question 4

Superior boundary of infratemporal fossa?

Answer 4

Infratemporal surface of greater wing of sphenoid

Question 5

Medial boundary of infratemporal fossa?

Answer 5

Lateral pterygoid plate

Question 6

Lateral boundary of infratemporal fossa?

Answer 6

Ramus of mandible

Question 7

Name the:
Muscles x2
Nerve(s) x3
Artery
Venous plexus
That run in the infratemporal fossa

Answer 7

Lateral and medial pterygoid
CNV3
Chorda tympani
Otic ganglion
Maxillary artery
Pterygoid venous plexus

Question 8

Action of medial pterygoid?

Answer 8

Assists in elevating the mandible

Question 9

Action of lateral pterygoid?

Answer 9

Pulls the neck of the mandible forward

Question 10

Innervation of the pterygoids?

Answer 10

CNV3

Question 11

Name the nerves in the anterior division of CNV3? (5)

Answer 11

x2 deep temporal
Masseteric
Nerve to lateral pterygoid
Buccal

Question 12

Name the nerves in the posterior division of CNV3? (4)

Answer 12

Lingual
Inferior alveolar
Myhlohyoid
Auriculotemporal

Question 13

What are the pre-division branches of CNV3? (3)

Answer 13

Meningeal
Nerve to medial pterygoid
Communicating branch

Question 14

What are the branches of the maxillary artery that go to muscles? (3)

Answer 14

Deep temporal
Masseteric
Pterygoid

Question 15

Between the 2 heads of which muscle does the maxillary artery pass to go into the pterygomaxillary fissue?

Answer 15

Lateral pterygoid

Question 16

What branch does the maxillary artery give off after passing into the pterygomaxillary fissure?

Answer 16

Posterior superior alveolar branch

Question 17

What are the 3 parts of the maxillary artery?

Answer 17

Mandibular
Pterygoid
Pterygopalantine

Question 18

What are the ptergopalantine branches of the maxillary artery? (3)

Answer 18

Posterior superior alveolar
Infraorbital
Descending palatine
Artery of pterygoid canal
Sphenopalantine

Question 19

Does the pterygoid venous plexus surround the medial or lateral pterygoid?

Answer 19

Lateral

Question 20

Into which vein does the ptergyoid venous plexus drain?

Answer 20

Maxillary

Question 21

What nerve does the chorda tympani branch from?

Answer 21

Facial CNVII

Question 22

What is the otic ganglion?

Answer 22

Parasympathetic ganglion in the infratemporal fossa

Question 23

What does the otic ganglion innervate?

Answer 23

Parotid gland (with glossopharyngeal)

Question 24

What type of joint is TMJ?

Answer 24

Synovial

Question 25

What are the articulating surfaces of the TMJ?

Answer 25

Head of mandible and mandibular fossa And articular tubercle on the squamous part of temporal bone

Question 26

What 2 nerves supply the TMJ?

Answer 26

Auriculotemporal Masseteric

Question 27

What are the medial (2) and lateral (1) ligaments that support the capsule of the TMJ?

Answer 27

Medial - sphenomandibular and stylomandibular Lateral - temporomandibular