Infratemporal Fossa And TMJ

Question 1

Infratemporal fossa

Answer 1

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

Question 2

Infratemporal fossa boundaries

Answer 2

Anterior- posterior surface of maxilla
Posterior- styloid process
Superior- infratemporal surface of the greater wing of sphenoid
Medial- lateral pterygoid plate
Lateral- ramus of the mandible

Question 3

Contents of the infratemporal fossa

Answer 3

Lateral and medial pterygoid 
Mandibular division of trigeminal and branches
Maxillary artery and branches
Pterygoid venous plexus
Chorda tympani 
Optic ganglion

Question 4

Maxillary artery

Answer 4

Deep temporal, masseteric and pterygoid branches to muscles

Passes between 2 heads of lateral pterygoid to go into pterggomaxillary fissure

Question 5

3 parts of maxillary artery

Answer 5

Mandibular
Pterygoid
Pterygopalatine- posterior superior alveolar, infraorbital, anterior superior alveolar, palatine, pharyngeal and sphenopalatine

Question 6

Pterygoid venous plexus

Answer 6

Surrounds lateral pterygoid
Veins from orbit, nasal and oral cavities
Communicates with cavernous sinus and facial vein
Drained by maxillary vein

Question 7

Temporomandibular joint

Answer 7

Synovial joint between head of mandible and maindular fossa
Articular surface- fibrocartilage
Fibrous capsule
Nerve- auriculotemporal and masseteric
Capsule reinforced by lateral temporomandibular ligament
Sphenomandibular and stylomandibular ligament