Which side of the arm corresponds to the ulnar nerve?

The ulnar nerve runs along the inner side of the arm and is primarily responsible for providing sensation to the little finger (pinky) and part of the ring finger, as well as controlling some of the muscles in the hand that are responsible for fine motor activities. When referring to the side of the arm that corresponds to the ulnar nerve, it is associated with the pinky side because that is the area most affected by its function and sensation. This is why the pinky side is the correct choice. Understanding the anatomical positioning and function of the ulnar nerve is crucial for professionals in nail technology, especially when considering client services or potential nerve-related issues.