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