**Core Concept**
The superior orbital fissure is a critical anatomical structure through which various nerves and vessels pass, providing essential innervation and blood supply to the orbit. It serves as a passageway for the oculomotor nerve, trochlear nerve, abducens nerve, ophthalmic branch of the trigeminal nerve, and several other structures.
**Why the Correct Answer is Right**
The correct answer to this question is related to the anatomy of the superior orbital fissure. The oculomotor nerve, trochlear nerve, and abducens nerve are all cranial nerves that pass through the superior orbital fissure. The ophthalmic branch of the trigeminal nerve, also known as the V1 nerve, is responsible for sensory innervation of the eye and surrounding tissues. However, the structures that do not pass through the superior orbital fissure are the inferior ophthalmic vein and the nasociliary nerve.
**Why Each Wrong Option is Incorrect**
**Option A:** The oculomotor nerve (III) is one of the cranial nerves that pass through the superior orbital fissure, making this option incorrect.
**Option B:** The trochlear nerve (IV) also passes through the superior orbital fissure, making this option incorrect.
**Option C:** The abducens nerve (VI) is another cranial nerve that passes through the superior orbital fissure, making this option incorrect.
**Clinical Pearl / High-Yield Fact**
One important fact to remember is that the superior orbital fissure is a common site for lesions and injuries, which can lead to cranial nerve palsies and other complications. It's essential for clinicians to be aware of the anatomy of this region to provide accurate diagnoses and treatments.
**Correct Answer:** D.
Free Medical MCQs Β· NEET PG Β· USMLE Β· AIIMS
Access thousands of free MCQs, ebooks and daily exams.
By signing in you agree to our Privacy Policy.