The infraorbital nerve controls which of the following?

A 16-year-old boy comes to the emergency department because of a facial laceration under his right eye. He has no significant past medical history. He recently dropped a clean beaker in his chemistry laboratory and was cut by a shard of the broken glass. Infraorbital nerve damage is suspected. The infraorbital nerve controls which of the following?

2.Motor output to inferior rectus
3.Motor output to orbicularies oculi
4.Sensation from the cornea
5.Sensation from the upper lip


The infraorbital nerve is a terminal branch of the maxillary division (V2) of the trigeminal nerve. The trigeminal nerve provides sensory innervation to the face. The maxillary nerve is the second branch of the trigeminal nerve and exits the cranium through the foramen rotundum into the pterygopalatine fossa. From there a branch of it (infraorbital nerve) courses through the infraorbital canal at the superior part of the maxillary sinus. The infraorbital nerve emerges through the infraorbital foramen just inferior to the orbit and gathers sensory information from the lower eyelid, side of the nose, and the upper lip. Damage to this nerve would cause a loss of sensation to these parts of the face.

In the case that there is a facial laceration in this area of the face that requires suturing, an infraorbital nerve block can be performed. This is achieved through an intraoral method to get the needle to the area of the infraorbital nerve.