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PTERYGOID MUSCLES<br />
SUPERIOR PTERYGOID MUSCLE<br />Short and thick<br />Has two separate heads<br />Superior head<br />Inferior head<br />Lies...
SUPERIOR HEAD<br />Smaller of the two heads<br />ORIGIN: Infratemporal crest of the greater wing of the sphenoid bone<br /...
INFERIOR HEAD<br />ORIGIN: Lateral surface of pterygoid plate<br />INSERTION: Articular disc and pterygoid fovea<br />
INFERIOR HEAD (ORIGIN)<br />
ACTION<br />Depress the mandible<br />Protrude mandible<br />Side to side movement of mandible<br />
INNERVATION<br />Pterygoid branch of the mandibular division of the trigeminal nerve<br />
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Pterygoid muscles

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Transcript of "Pterygoid muscles"

  1. 1. PTERYGOID MUSCLES<br />
  2. 2. SUPERIOR PTERYGOID MUSCLE<br />Short and thick<br />Has two separate heads<br />Superior head<br />Inferior head<br />Lies superiorly to Inferior Pterygoid Muscle<br />
  3. 3. SUPERIOR HEAD<br />Smaller of the two heads<br />ORIGIN: Infratemporal crest of the greater wing of the sphenoid bone<br />INSERTION: Articular capsule and articular disc of the temporomandibular joint<br />
  4. 4. INFERIOR HEAD<br />ORIGIN: Lateral surface of pterygoid plate<br />INSERTION: Articular disc and pterygoid fovea<br />
  5. 5. INFERIOR HEAD (ORIGIN)<br />
  6. 6. ACTION<br />Depress the mandible<br />Protrude mandible<br />Side to side movement of mandible<br />
  7. 7. INNERVATION<br />Pterygoid branch of the mandibular division of the trigeminal nerve<br />
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