1. INFRATEMPORAL REGION

2. Boundaries Anterior: Maxilla. Superior: Greater wing of sphenoid.
Medial:
Lateral pterygoid plate.
Lateral:
Coronoid process and ramus of mandible.

3. Boundaries Inferior: Posterior: Communicates with:
Continuous with neck.
Posterior:
TMJ and styloid process.
Communicates with:
Orbit via inferior orbital fissure.
Pterygopalatine fossa via pterygomaxillary fissure.

4. Contents Mandibular nerve. Maxillary artery.
Medial and lateral pterygoid muscles.
Lower part of temporalis muscle.
Chorda tympani nerve.
Otic ganglion.

6. Maxillary Artery Characteristics and branches:
Terminal branch of external carotid artery.
Divided into three parts by lateral pterygoid muscle:
Artery may pass superficial or deep to muscle.

7. Maxillary Artery: Parts
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.

9. Maxillary Artery: First Part
Deep auricular:
Lies within parotid gland.
Supplies TMJ, ext. aud. Meatus, outer surface of ear drum.

10. Maxillary Artery: First Part
Anterior tympanic:
Arises within parotid gland.
Supplies tympanic cavity and inner surface of ear drum.

11. Maxillary Artery: First Part
Middle meningeal:
Enters cranial cavity via foramen spinosum.
Supplies skull and dura mater.

12. Maxillary Artery: First Part
Accessory meningeal:
Enters cranial cavity via foramen ovale.
Supplies semilunar ganglion (CN V) and dura mater.

13. Maxillary Artery: First Part
Inferior alveolar:
Enters mandibular foramen.
Supplies lower teeth and gums.
Passes through mental foramen and becomes mental artery.

15. Maxillary Artery: Second Part
Branches to muscles of mastication.
Buccal artery.

16. Maxillary Artery: Third Part
Posterior superior alveolar:
Runs with superior alveolar nerve (CN V-2).
Supplies upper molars and premolars.

17. Maxillary Artery: Third Part
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.

18. Maxillary Artery: Third Part
Descending palatine:
To soft and hard palates.
Terminal branch.
Artery of pterygoid
canal:
To pharynx and auditory tube.