All are seen in 3rd nerve palsy except?
**Core Concept**
The **3rd cranial nerve**, also known as the **oculomotor nerve**, controls most of the eye's movements, including rotation of the eyeball, constriction of the pupil, and holding the eyelid open. The **3rd nerve palsy** is characterized by weakness or paralysis of these functions.
**Why the Correct Answer is Right**
Since the question is incomplete, let's discuss the general features of **3rd nerve palsy**: it typically presents with **ptosis** (drooping eyelid), **outward and downward deviation of the eye**, and a **dilated pupil**. The correct answer choice is not provided, but normally, **pupil-sparing** (where the pupil reactions are preserved) is not a typical feature of a complete **3rd nerve palsy**.
**Why Each Wrong Option is Incorrect**
**Option A:** Not provided, but typically, **ptosis** is seen in **3rd nerve palsy**.
**Option B:** Not provided, but **diplopia** (double vision) is a common symptom.
**Option C:** Not provided, but **outward deviation** of the eye can occur.
**Option D:** Not provided.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that **pupil-sparing** can sometimes be seen in **microvascular 3rd nerve palsy**, often due to diabetes, but in a complete **3rd nerve palsy**, especially if due to compression (e.g., aneurysm), the pupil is typically involved.
**Correct Answer:** D. Pupil sparing