College of Massage Therapists of British Columbia (CMTBC) Practice Exam

What is the most common location for ulnar nerve injury?

1. Wrist joint

2. Elbow (cubital tunnel)

3. Shoulder

4. Forearm

The correct answer is: Elbow (cubital tunnel)

The most common location for ulnar nerve injury is at the elbow, specifically in the area known as the cubital tunnel. The ulnar nerve runs along the inside of the elbow and can be compressed or irritated in this region, particularly when the elbow is flexed, which can lead to a condition known as cubital tunnel syndrome. This compression can occur due to various factors, such as repetitive elbow flexion, direct trauma, or anatomical variations. In the cubital tunnel, the ulnar nerve is relatively superficial and is more vulnerable to injury compared to other locations. Symptoms of ulnar nerve injury here often include numbness, tingling, or pain in the ring and little fingers, as well as weakness in gripping tasks. Other locations mentioned, such as the wrist joint and forearm, can certainly experience ulnar nerve issues, but injuries there are less common when compared to the cubital tunnel. The shoulder is also less frequently associated with ulnar nerve injury since the nerve itself is more protected within the arm as it descends from the neck through the shoulder region. Understanding the anatomy and mechanics of the ulnar nerve at the elbow can greatly assist in recognizing and managing potential injuries effectively.