All nerve are involved in superior orbital fissure syndrome except-
**Core Concept**
The superior orbital fissure syndrome is a clinical condition caused by the involvement of multiple nerves that traverse through the superior orbital fissure, leading to a constellation of symptoms including ptosis, proptosis, diplopia, and ophthalmoplegia. This syndrome involves the compression or injury of nerves that pass through the superior orbital fissure, which is a critical anatomical structure in the orbit.
**Why the Correct Answer is Right**
The superior orbital fissure is a narrow opening in the orbit through which several nerves pass, including the oculomotor nerve (CN III), trochlear nerve (CN IV), abducens nerve (CN VI), ophthalmic branch of the trigeminal nerve (V1), and the first two branches of the oculomotor nerve. These nerves are responsible for controlling eye movements, eyelid function, and sensation to the eye. The involvement of these nerves leads to the characteristic symptoms of superior orbital fissure syndrome.
**Why Each Wrong Option is Incorrect**
* **Option A:** The lacrimal nerve, a branch of the ophthalmic nerve (V1), passes through the superior orbital fissure and is involved in the syndrome. Therefore, it is not the correct answer.
* **Option B:** The inferior division of the oculomotor nerve also passes through the superior orbital fissure and is involved in the syndrome. Therefore, it is not the correct answer.
* **Option D:** The superior division of the oculomotor nerve passes through the superior orbital fissure and is involved in the syndrome. Therefore, it is not the correct answer.
**Clinical Pearl / High-Yield Fact**
The superior orbital fissure syndrome is a clinical diagnosis that requires a high index of suspicion and a thorough understanding of the anatomy and innervation of the orbit. The presence of multiple cranial nerve palsies, particularly those involving the oculomotor, trochlear, and abducens nerves, should raise suspicion for this condition.
**Correct Answer:** None of the above nerves are typically spared in the superior orbital fissure syndrome.