Left orbicularis oculi, seen from behind. (Infraorbital nerve labeled at lower left.)
Sensory areas of the head, showing the general distribution of the three divisions of the fifth nerve. (Infraorbital nerve labeled at center left, at the nose.)
|Anatomical terms of neuroanatomy|
After the maxillary nerve enters the infraorbital canal, the nerve is frequently called the infraorbital nerve. This nerve innervates (sensory) the lower eyelid, upper lip, and part of the nasal vestibule and exits the infraorbital foramen of the maxilla. There is a cross innervation of this nerve on the other side of jaw.
After a fracture of the floor of the orbit, the infraorbital nerve may become trapped, producing an area of anaesthesia under the orbital rim.