Medial Pterygoid

Written by Max Bidewell

Last updated January 16, 2023 • 5 Revisions

The medial pterygoid is a muscle of mastication (chewing). It has deep and superficial heads, and is located inferiorly to the lateral pterygoid.

  • Attachments:
    • The superficial head originates from the maxillary tuberosity and the pyramidal process of palatine bone.
    • The deep head originates from the medial aspect of the lateral pterygoid plate of the sphenoid bone.
    • Both heads attach to the ramus of the mandible near the angle of mandible.
  • Actions: Elevation of the mandible (closing the mouth).
  • Innervation: Mandibular nerve (V3).
  • Blood Supply: Pterygoid branches of the maxillary, buccal and facial arteries.

Fig 1
The medial and lateral pterygoids.

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