norma lateralis, pterion and asterion, significance of pterion, temporal fossa, infra temporal fossa, bounaries of temporal and infra temporal fossa, contents of temporal and infra temporal fossa

1. TEMPORAL
INFRATEMPORAL
FOSSA
Dr sana yaseen
Anatomy Dept.
KIMS

4. TEMPORAL FOSSA
■ Above: temporal line of frontal bone
■ Below : upper border of the Zygomatic arch laterally,
infratemporal crest of the greater wing of the sphenoid bone
medially.
■ Anterior wall: Zygomatic bones and parts of frontal and sphenoid
bone. (separate fossa from the orbit)
■ Floor: H shape suture formed by the fusion of 4 bones.
– Deep to pterion runs: middle meningeal vein, anterior division of
middle meningeal artery, stem of lateral sulcus of brain.

7. CONTENTS:
■ Temporalis muscle and its fascia
■ Deep temporal nerve and vessles
■ Auriculotemporal nerve
■ Superficial temporal artery

9. INFRATEMPORAL FOSSA
■ Roof: medially infratemporal surface of greater wing of sphenoid ,
squamous part of temporal bone
laterally: incomplete as it communicates with temporal fossa
■ Floor is open:
■ Medial wall: lateral pterygoid plate , pyramidal process of palatine bone
■ Lateral wall: ramus of mandible
■ Anterior wall: posterior surface of maxilla, medial surface of Zygomatic
bone
■ Posterior wall: is open

10. pyramidal process of
palatine bone

11. CONTENTS
■ Lateral pterygoid and medial pterygoid muscles
■ Branches of mandibular nerve
■ Otic ganglion
■ Chorda tympani
■ Maxillary artery
■ Pterygoid venous plexus
■ Spheno mandibular ligament