The pterygospinous ligament connects the lateral pterygoid plate to the spine of the sphenoid, occasionally ossifying to form the pterygospinous foramen through which the buccal nerve passes.
Provides structural support between the pterygoid plate and sphenoid spine, and when present as a bony bar, creates an additional foramen in the infratemporal fossa.
The pterygospinous bar (when ossified) may trap the buccal nerve, producing cheek numbness or sensory alteration. It is identified in infratemporal fossa surgery and in the planning of mandibular nerve blocks.
Ossified pterygospinous ligament compressing the buccal nerve producing cheek numbness, identified on CT scan of the infratemporal fossa.
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