The nasopalatine nerve is a branch of which division of the trigeminal nerve?

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The nasopalatine nerve is a sensory branch of the maxillary division of the trigeminal nerve. It travels with the sphenopalatine (pterygopalatine) nerves from the pterygopalatine fossa through the sphenopalatine foramen into the nasal cavity, then descends via the incisive canal to supply the anterior hard palate and the nasal septum mucosa. This pathway ties it to the maxillary (V2) division, not the ophthalmic (V1) or mandibular (V3) divisions, and not to cranial nerve X.