Medial pterygoid muscle

The medial pterygoid muscle is one of the muscles of mastication

The medial pterygoid muscle is a thick and square shaped muscle. It has two heads of origin. The deep head is the major component of the origin and is attached to the medial aspect of the lateral pterygoid plate of the sphenoid bone. The superficial head is attached to the maxillary tuberosity and the pyramidal process of the palatine bone.

The fibres of the medial pterygoid muscle run posterolaterally and insert to the medial surface of the mandibular ramus and angle.

Actions

The medial pterygoid acts together with masseter to elevate the mandible.

Acting together with the lateral pterygoid muscles, they protrude the mandible which is important in the grinding movement of the mastication.

The arterial supply to medial pterygoid muscle is from the pterygoid branches of the maxillary artery.

Medial pterygoid nerve of the mandibular division of the trigeminal nerve (CN V3).

Head and neck anatomy
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Article Information

rID: 48303
System: Head & Neck
Section: Anatomy
Tags: refs, cases
Synonyms or Alternate Spellings:

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Cases and Figures

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    Figure 1: pterygoid muscles
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