Muscles of Mastication A Jaw closing muscles 1

Masseter Origin: zygomatic process of the maxilla and inferior border of zygomatic arch Insertion:

Temporalis Origin: temporal fossa and temporal fascia Insertion: coronoid process of the mandible Innervation:

Medial Pterygoid Origin: pterygoid fossa on medial surface of lateral pterygoid plate Insertion: medial

Origin of Medial Pterygoid 05/23/05 Review 13

Lateral Pterygoid -- Inferior Head Origin: lateral surface of lateral pterygoid plate Insertion: anterior

Origin of Lateral Pterygoid, Inferior head 05/23/05 Review 16

Lateral Pterygoid -- Superior Head Origin: infratemporal fossa of greater sphenoid wing Insertion: anterior

Superior Head of Lateral Pterygoid 05/23/05 Review 18

Digastric Origin: posterior digastric mastoid notch of temporal bone Insertion: anterior digastric lingual, inferior

Thank you and Best of Luck! 05/23/05 Review 21

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Muscles of Mastication A. Jaw closing muscles 1. 2. 3. B. Masseter Temporalis Medial pterygoid Jaw opening muscles 1. Lateral pterygoid a) b) 2. 05/23/05 Inferior head Superior head Anterior digastric Review 1

Masseter Origin: zygomatic process of the maxilla and inferior border of zygomatic arch Insertion: angle of the mandible inferior, lateral side of ramus Innervation: masseteric nerve Function: elevate mandible 05/23/05 Review 2

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Temporalis Origin: temporal fossa and temporal fascia Insertion: coronoid process of the mandible Innervation: temporal nerve Function: elevate mandible 05/23/05 Review 5

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Medial Pterygoid Origin: pterygoid fossa on medial surface of lateral pterygoid plate Insertion: medial surface of angle of the mandible Innervation: medial pterygoid nerve Function: elevate mandible 05/23/05 Review 8

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Sphenoid 05/23/05 Review 11

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Origin of Medial Pterygoid 05/23/05 Review 13

Lateral Pterygoid -- Inferior Head Origin: lateral surface of lateral pterygoid plate Insertion: anterior neck of mandible Innervation: branch of masseteric or buccal nerve Function: pull condyle and disk along the eminence 05/23/05 Review 14

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Origin of Lateral Pterygoid, Inferior head 05/23/05 Review 16

Lateral Pterygoid -- Superior Head Origin: infratemporal fossa of greater sphenoid wing Insertion: anterior neck of the mandible Innervation: branch of masseteric or buccal nerve 05/23/05 Review Function: pull condyle and disk along the eminence 17

Superior Head of Lateral Pterygoid 05/23/05 Review 18

Digastric Origin: posterior digastric mastoid notch of temporal bone Insertion: anterior digastric lingual, inferior border of the mandible Innervation: Posterior digastric--facial nerve Anterior digastric--mylohyoid, mandibular nerve Function: Lower mandible, raise hyoid 05/23/05 Review 19

ANTERIOR DIGASTRIC 05/23/05 Review 20

Thank you and Best of Luck! 05/23/05 Review 21