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Pterygospinous Ligament (Left)
Connective Tissue

Pterygospinous Ligament (Left)

Ligamentum pterygospinale

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Structure

The pterygospinous ligament is a band of fibers that connects one part of the sphenoid bone to another. In some instances, it may be replaced with muscle fibers or may be ossified.

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Anatomical Relations

The pterygospinous ligament extends between the spine of the sphenoid bone and the pterygospinous process on the posterior margin of the lateral pterygoid plate of the sphenoid bone.

Function

If ossified, this ligament may form a foramen, the pterygospinous foramen, that transmits the muscular branches of the mandibular nerve to the temporalis, masseter, and the lateral pterygoid muscles.

List of Clinical Correlates

—Mandibular neuralgia

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Joint Ligament

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Laxity of the TMJ ligaments → hypotonus of the temporal and masseter muscles → dropping of the jaw.

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