Infratemporal Fossa and TMJ Flashcards Preview

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Flashcards in Infratemporal Fossa and TMJ Deck (49)
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1

What is the infratemporal fossa?

Space beneath the base of the skull between the skull and the ramus of the mandible

2

What are the boundaries of the infratemporal fossa?

Anterior - Posterior surface of the maxilla
Posterior - Styloid process
Superior - Infratemporal surface of the greater wing of sphenoid
Medial - Lateral pterygoid plate
Lateral - Ramus of the mandible

3

What is the contents of the infratemoral fossa?

Lateral and medial pterygoid, Mandibular division of trigeminal and branches, Maxillarty artery and branches, Pterygoid venous plexus, Chorda tympani and Otic ganglion

4

What is the function of the medial pterygoid?

Assists in elevating the mandible

5

What is the function of the Lateral pterygoid?

Pulls the neck of the mandible forward

6

What movements does both the medial and lateral pterygoid give?

Chewing movements

7

What innervates the medial and lateral pterygoid?

Mandibular division of CN V

8

What divisions does the mandibular division of trigeminal nerve have?

Anterior and posterior divisions

9

What are the anterior divisions of the mandibular division of CN V?

x2 deep temporal, masseteric nerve to lateral pterygoid, buccal (sensory)

10

What are the posterior divisions of the mandibular division of CN V?

Lingual (joined by chords tympani), inferior alveolar, mylohyoid and auricultemporal

11

What is the passage of the maxillary artery?

Passes between 2 heads of lateral pterygoid to go into ptergomaxillary fissure - fossa and give off posterior superior alveolar branch

12

What are the pre divisions of the mandibular division of CN V?

Meningeal, nerve to medial ptertgoid and communicating branch

13

What is the communicating branch in the pre divisions of mandibular division of CN V?

Tensor tympani and tensor velo palatini

14

What are the branches of the Maxillary artery?

Deep temporal, masseteric and pterygoid branched to muscles

15

What are the 3 parts of the maxillary artery?

Mandibular, pterygoid and pterygopalatine

16

What are the Pterygopalatine branches?

Posterior superior alveolar, Infraorbital, anterior superior alveolar branches and palatine, pharyngeal and sphenopalatine branches.

17

What does the pterygoid venous plexus surround?

Lateral pterygoid

18

Where are the veins of the pterygoid venous plexus from?

Orbit, nasal and oral cavities

19

What does the pterygoid venous plexus communicate with?

Cavernous sinus and facial vein

20

What drains the pterygoid venous plexus?

Maxillary vein

21

What is the route for infection?

Pterygoid venous plexus

22

What is involved in the posterior superior alveolar branch?

Upper molar and premolar

23

What is involved in the infraorbital branch?

Canal in floor of orbit, foramen

24

What is involved in the anterior superior alveolar branch?

Upper incisor and canine

25

Has the otic ganglion have a synapse?

No

26

What goes through the otic ganglion?

Postganglionic sympathetic fibres and motor neves to tensor tympani and tensor veli palatine (CN VIII)

27

What happened at the foramen oval?

Has the mandibular division

28

What joint in the temporomandibular joint (TMJ)?

Synovial joint

29

Where is the TMJ?

Between the head of mandible and mandibular fossa and articular tubercle on the squamous part of the temporal bone?

30

What type of cartilage covers the articular surfaces of TMJ?

Fibrocartilage (membranous ossification)