Medial superior posterior nasal branches of maxillary nerve

The medial superior posterior nasal branches of maxillary nerve arise originally as a group of about seven nerves from the pterygopalatine ganglion inside the pterygopalatine fossa. These nerves pass through the sphenopalatine foramen inside the lateral wall of nasal cavity. Out of these nasal nerves, those which do not innervate the lateral wall, pass across the roof of nasal cavity to supply the medial wall as the medial superior posterior nasal branches of maxillary nerve.

One of the nasal nerves in the medial wall of nasal cavity forms the nasopalatine nerve. It is the largest of all the nasal nerves and passes anteroinferiorly along the medial nasal septum. It eventually passes through the incisive canal and incisive fossa in the hard palate to enter the roof of the oral cavity. Here it supplies mucosa, gums and glands adjacent to the incisor teeth.