Which nerve is NOT found in the superior orbital fissure?

The correct response highlights that the frontal nerve, although it does pass through the orbit, does not traverse the superior orbital fissure. Instead, the frontal nerve branches off from the ophthalmic nerve (CN V1) and enters the orbit via the superior orbital fissure, but it primarily occupies the intraorbital space rather than passing directly through the fissure itself.

The other nerves listed—trochlear, oculomotor, and abducent—are indeed found within the superior orbital fissure. The trochlear nerve (CN IV) innervates the superior oblique muscle and passes through the superior orbital fissure to reach the orbit. The oculomotor nerve (CN III) is responsible for the majority of eye movements and also traverses the superior orbital fissure. Similarly, the abducens nerve (CN VI) innervates the lateral rectus muscle and enters the orbital cavity through the superior orbital fissure as well.

Understanding the anatomical pathways of these nerves is crucial for diagnosing and managing conditions related to cranial nerve injuries or orbital lesions, as they play significant roles in ocular motor function.