"It leaves the fossa inferomedially through the sphenopalatine foramen with the posterior superior nasal nerves to enter the nasal cavity just behind the superior nasal meatus, where it passes along the roof of the nose and into the nasal septum, where it may groove the vomer. Here, it supplies the posteroinferior nasal septum. It continues coursing anteroinferiorly in the nasal septum to enter the incisive canal, then passes through the incisive foramen, entering the roof of the mouth. Here, it supplies the anterior hard palate and the gingiva behind the two maxillary incisor teeth."