The Nasopalatine nerve arises from the maxillary division of the trigeminal nerve (V2). It has parasympathetic and sensory components. It is associated with the pterygopalatine ganglion and courses through the sphenopalatine foramen, across the roof of the nasal cavity to the nasal septum, and through the incisive canal. It primarily innervates the glands and mucosa of the nasal septum and the hard palate.
nasopalatine nerve can be anesthetized by injecting anesthetic into the incisive
fossa in the hard palate, numbing the palatal mucosa and the lingual gingivae.