Download Temporal and infratemporal fossae

Temporal and infratemporal
fossae
Lecture 3
OBJECTIVES
• Understand the
temporal region
– Boundaries
– Contents
– Blood supply
• Know infratemporal
region
– Boundaries
– Contents
Temporal region
• Temporal fossa
• Infratemporal fossa
• Regions above and
below zygomatic arch
Temporal fossa
• Contains the temporalis
muscle
• Boundaries
 Post& sup- temporal
lines
 Ant- frontal & zygomatic
bones
 Lat- zygomatic arch
 Inf- infratemporal crest
• Floor
 frontal bone
 Parietal bone
 Temporal bone
 Greater wing of the
sphenoid
Pterion
TF
• Roof – temporalis fascia
 Attaches to the superior
temporal line
• Contents- temporalis
muscle
 Deep temporal nerve &
vessels
TM
Deep
temporal
nerve&
vessels
Infratemporal fossa
• Region deep and
inferior to zygomatic
arch
• Boundaries
 Lat- ramus of the
mandible
 Medially- lateral
pterygoid plate
 Ant- post aspect of
maxilla
 Post- tympanic plate,
mastoid, styloid
processes
 Sup- infratemporal
surface of the sphenoid
bone
 Inf- attachment of the
medial pterygoid muscle
on the angle of mandible
Contents
•
•
•
•
•
Temporalis muscle
Pterygoid muscles
Maxillary artery
Pterygoid venous plexus
Nerves
 Mandibular
 Inferior alveolar
 Lingual
 Buccal
 Chorda tympani
 Otic ganglion
Pterygoid
venous
plexus
Maxillary .a
Lingual nerve
Inf. Alveolar N
• Pterigoid
venous
plexus
Clinical
• Spread of infections to
the intracranial fossa
Thank you