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TEMPORAL, INFRATEMPORAL REGIONS AND TEMPOROMANDIBULAR JOINT 1. Lies superior to zygomatic arch? Temporal region 2. Occupied primarily by upper portion of temporalis muscle? Temporal fossa 3. Boundaries of temporal fossa? Anteriorly by frontal and zygomatic bones, laterally by zygomatic arch, floor formed by parts of the four bones that form the period (frontal, parietal, temporal, greater wing sphenoid) 4. Superiorly attaches to superior temporal lines, inferiorly splits into two layers, attach to lateral and medial surfaces of zygomatic arch? Temporal fascia 5. Deep to ramus of mandible and posterior to maxilla? Infratemporal fossa 6. Boundaries infratemporal fossa? Laterally by ramus of mandible, medially by lateral pterygoid plate, anteriorly by posterior aspect of maxialla, posteriorloy by tympanic plate, mastoid and styloid process of temporal bone, superiorly by infratemporal surface of greater wing sphenoid 7. Origin floor of temporal fossa, deep surface of temporal fascia? Temporalis 8. Insertion temporalis? Tip and medial surface of coronoid process of mandible 9. Nerve supply? Deep temporal nerves 10. Actions? Elevates mandible and closing jaws 11. Origin masseter? From inferior border and medial surface of zygomatic arch 12. Insertion? Lateral surface ramus of mandible 13. Nerve supply? Masseteric nerve ( anterior division of mandibular nerve)
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