Median nerve lesion at the wrist causes all of the following Except
**Core Concept**
A median nerve lesion at the wrist affects the motor and sensory functions of the hand. The **median nerve** is responsible for innervating the thenar muscles and providing sensory innervation to the palmar aspect of the thumb, index, middle finger, and the radial half of the ring finger.
**Why the Correct Answer is Right**
Since the correct answer is not provided, let's analyze the general effects of a median nerve lesion at the wrist. This type of lesion typically leads to **thenar muscle atrophy**, **weakness in thumb opposition**, and **sensory loss** in the distribution of the median nerve.
**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific details of option A, we cannot directly address why it is incorrect.
**Option B:** Similarly, without the details of option B, its incorrectness cannot be explained.
**Option C:** And option C's incorrectness also cannot be discussed without its specifics.
**Option D:** The same applies to option D.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that a median nerve lesion at the wrist will spare the **flexor carpi radialis** and **palmaris longus** muscles, as these are innervated more proximally.
**Correct Answer:** Correct Answer: D. No sensory loss on the dorsal aspect of the index and middle fingers