common site of ulnar nerve entrapment:*

The most common site of ulnar nerve entrapment is at the elbow, specifically in the cubital tunnel. This area is where the ulnar nerve passes through a tunnel of tissue (the cubital tunnel) that runs under a bump of bone at the inside of your elbow. This bony bump is called the medial epicondyle. The spot where the nerve runs under the medial epicondyle is commonly referred to as the "funny bone." At the elbow, the ulnar nerve travels through a tunnel of tissue (the cubital tunnel) that runs under a bump of bone at the inside of your elbow. This can cause numbness or pain in the elbow, hand, wrist, or fingers.