The branches of the maxillary nerve are:
The zygomatic nerve is small. It enters the orbit through the anterior part of the inferior orbital fissure, pierces the periosteum and almost immediately divides into two terminal branches – zygomatico-temporal and zygomatico-facial – which run forward between the periosteum and the bone of the lateral wall of the orbit, and then perforate the bone to reach the skin of the temple and face.
The infra-orbital nerve is the continuation of the maxillary nerve, and begins at the middle of the inferior orbital fissure, It enters the infra-orbital groove at once, accompanied by the infra-orbital branch of the maxillary artery and its companion vein. It runs forward in the floor of the orbit (which is also the roof of the maxillary sinus, traversing the infra-orbital groove and canal. It emerges into the face through the infra-orbital foramen, under cover of the levator labii superioris and orbicularis oculi, and ends at once by dividing into the labial, nasal, and palpebral branches.
About the middle of the floor of the orbit, it gives off a thick branch named the anterior superior dental nerve, which, with a branch of the infra-orbital artery, is conveyed to the canine and incisor teeth by a remarkably sinuous canal. The canal first runs forward in the roof of the maxillary sinus a little lateral to the infra-orbital canal; secondly, it curves medially in the anterior wall of the sinus to reach the side of the nose; thirdly, it descends toward the teeth; and, finally, it curves medially again to open to open into the nose close to the septum at the root of the anterior nasal spine. In the third and fourth parts of its course, the nerve gives branches not only to the teeth but also to the mucous membrane of the antero-inferior part of the nose. The superior dental nerves give twigs to the mucous lining of the maxillary sinus; and, from the plexus formed by their terminal branches, the gum as well as the teeth is supplied.
Related category• ANATOMY AND PHYSIOLOGY
Home • About • Copyright © The Worlds of David Darling • Encyclopedia of Alternative Energy • Contact