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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