Definition: the infratemporal fossa is an irregularly shaped
space inferior and deep to the zagomatic arch and posterior to the maxilla.
Walls of the infratemporal fossa:
Lateral wall: formed by the ramus of the mandible
Medial wall: formed by the lateral pterygoid plate.
Anterior wall: formed by the infratemporal surface of the
maxilla. This wall is limited superiorly by the inferior orbital fissure and
medially by the anterior surface of the condylar process of the temporal bone
The roof: this is formed by the greater wing of the sphenoid
bone. Foramen ovale and foramen spinosum open into the roof.
Floor: this is the point where the medial pterygoid muscle
attaches to the medial aspect of the mandible near the angle.
Content:
1.      
Maxillary artery
2.      
Pterygoid venous plexus
3.      
Mandibular nerve
4.      
Auriculotemporal nerve
5.      
Inferior alveola nerve
6.      
Lingual nerve
7.      
Buccal nerve
8.      
Otic nerve
9.      
Medial and lateral pterygoid plate
10.  
Corda tympani.
Clinical correlates: mandibular nerve block can be performed
in the infratemporal fossa. As the nerve emerges from the foramen ovale and
enters the infratemporal fossa local anaesthesia may be applied to the
mandibular nerve. The needle is passed through the mandibular notch into the
infratemporal fossa where anaesthetic agent is injected.