The last branch to arise from the maxillary nerve within the pterygopalatine fossa is the _____________ nerve. It descends along the infratemporal surface of the maxilla, and its branches enter the maxillary sinus.

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Posterior superior alveolar. The posterior superior alveolar nerve is the last branch to arise from the maxillary nerve within the pterygopalatine fossa. It descends along the infratemporal surface of the maxilla and enters the perforated area of the infratemporal surface as several branches, which pass through the posterior superior alveolar foramina and enter the maxillary sinus.

The Last Branch to Arise from the Maxillary Nerve Within