Pterygoid muscles
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Pterygoid muscles

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    Pterygoid muscles Pterygoid muscles Presentation Transcript

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