6.1-6.3

6.1 Pterygopalatine fossa:
Boundaries:
- Anteriorly (maxilla), laterally, infratemporal region
- Medially (palatine bone, extension of pterygomaxillary fissure)
- Posteriorly (pterygoid plates & greater wing of sphenoid)
Contents: maxillary artery & branches, maxillary nerve, pterygopalatine ganglion

6.2 Infratemporal region
Boundaries:
- Medial: Lateral pterygoid plate, PP fossa, superior constrictor, tensor/levator palati
- Lateral: Ramus of mandible, coronoid process
- Superior: Greater wing of sphenoid, squamous part of temporal, temporal region
- Inferior: carotid triangle
- Anterior: maxilla, inferior orbital fissure
- Posterior: carotid sheath, styloid process & deep styloid region
Contents: pterygoid muscles, temporalis tendon, maxillary vessels, V3, chorda tympani, otic ganglion

6.3 Deep styloid region
Boundaries:
- Lateral: Styloid process
- Medial: Posterolateral wall of pharnyx
- Anteriorly: Infratemporal region
- Posteriorly: Atlas & axis
- Superiorly: base of skull
- Inferiorly: Posterior belly of digastrics

Contents: Internal carotid artery, internal jugular vein, IX, X, XI, XII, sup. cervical ganglion