Which nerve is not related to humerus
**Core Concept**
The question tests knowledge of the anatomical relationship between nerves and the humerus, focusing on the **radial nerve**, **musculocutaneous nerve**, **axillary nerve**, and **median nerve**. These nerves are closely associated with the humerus due to their proximity and functional roles in the upper limb.
**Why the Correct Answer is Right**
The correct answer is based on the anatomical course and relationship of these nerves with the humerus. The **radial nerve** spirals around the shaft of the humerus, the **musculocutaneous nerve** originates near the humerus, and the **axillary nerve** wraps around the neck of the humerus.
**Why Each Wrong Option is Incorrect**
**Option A:** The radial nerve is closely related to the humerus as it spirals around its shaft.
**Option B:** The musculocutaneous nerve is related to the humerus due to its origin.
**Option C:** The axillary nerve is also related to the humerus, wrapping around its neck.
**Clinical Pearl / High-Yield Fact**
A key point to remember is the intimate relationship between the nerves and the humerus, which is crucial for understanding potential sites of nerve injury or compression.
**Correct Answer:** D. Median nerve