Infra temporal fossa
- 1. Dr.Anitha NancyT,Asst. professor, Department ofAnatomy
- 2. Infratemporal fossa Location Boundaries Contents Maxillary artery & its branches
- 3. Boundaries: Lateral=Ramus of Mandible Anterior=Maxilla Medial=Lat. Pterygoid Plate Roof=Sphenoid Temporal Maxilla Parietal Sphenoid Frontal Z Lat. Pterygoid Plate Pterygomaxillary Fissure Infratemporal Fossa Temporal Fossa
- 5. Anterior: Maxilla. Superior: Greater wing of sphenoid. Medial: Lateral pterygoid plate. Lateral: Coronoid process and ramus of mandible.
- 6. Inferior: Continuous with neck. Posterior: TMJ and styloid process.
- 7. COMMUNICATIONS: 1. With temporal fossa: through a gap deep to zygomatic arch 2. With cranial cavity: through foramen ovale, foramen spinosum, foramen lacerum 3. With orbit: through inferior orbital fissure 4. With pterygopalatine fossa: through pterygomaxillary fissure
- 9. Mandibular nerve. Maxillary artery. Pterygoid plexus of vein Medial and lateral pterygoid muscles. Lower part of temporalis muscle. Chorda tympani nerve. Otic ganglion.
- 11. Elevate mandible EXCEPT Lateral pterygoid Protrude mandible EXCEPT Temporalis Are supplied by anterior division of mandibular nerve EXCEPT Medial pterygoid
- 12. Inferior alveolar n. Lingual n. Facial n.. Submandibular ganglion. Otic ganglion. Lesser petrosal n. Chorda tympani Auriculotemporal n.
- 13. Ext. Cartotid Inf. AlveolarPost. Sup. Alveolar Maxillary Post. DeepTemporal Ant. DeepTemporal Infra-orbital Ext. Cartotid Post. Deep Temporal Ant. DeepTemporal Middle Meningeal Septal brr. Descending palatine Greater palatine Lesser palatine Sphenopalatine V3
- 14. Terminal branch of external carotid artery. Divided into 3 parts by lateral pterygoid muscle: Artery may pass superficial or deep to muscle.
- 15. First part: Origin to lower margin inferior to lateral pterygoid. Second part: Superficial or deep to inferior lateral pterygoid. Third part: Lies within pterygopalatine fossa.
- 17. Deep auricular: Lies within parotid gland. Supplies TMJ, ext. aud. Meatus, outer surface of ear drum.
- 18. Anterior tympanic: Arises within parotid gland. Supplies tympanic cavity and inner surface of ear drum.
- 19. Middle meningeal: Enters cranial cavity via foramen spinosum. Supplies skull and dura mater.
- 20. Accessory meningeal: Enters cranial cavity via foramen ovale. Supplies semilunar ganglion (CN V) and dura mater.
- 21. Inferior alveolar: Enters mandibular foramen. Supplies lower teeth and gums. Passes through mental foramen and becomes mental artery.
- 23. Branches to muscles of mastication. Buccal artery.
- 24. Posterior superior alveolar: Runs with superior alveolar nerve (CN V-2). Supplies upper molars and premolars.
- 25. Infraorbital: Enters orbit via inferior orbital fissure. Runs with infraorbital nerve. Supplies lower eyelid, side of nose, upper lip, oral mucosa. Gives rise to anterior and middle superior alveolar arteries.
- 26. Descending palatine: To soft and hard palates. Terminal branch. Artery of pterygoid canal: To pharynx and auditory tube.