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Elbow nerve entrapment12/17/2023 Most of the symptoms, however, occur in your hand. This is commonly called “hitting your funny bone.”Ĭubital tunnel syndrome can cause an aching pain on the inside of the elbow. A direct blow to the inside of the elbow can cause pain, electric shock sensation, and numbness in the little and ring fingers.Fluid buildup in the elbow can cause swelling that may compress the nerve.Leaning on your elbow for long periods of time can put pressure on the nerve.Over time, this sliding back and forth may irritate the nerve. In some people, the nerve slides out from behind the medial epicondyle when the elbow is bent.This can aggravate symptoms of ulnar nerve compression and cause you to wake up at night with your fingers asleep. For example, many people sleep with their elbows bent. Because this can irritate the nerve, keeping your elbow bent for long periods or repeatedly bending your elbow can cause painful symptoms. When your bend your elbow, the ulnar nerve stretches around the boney ridge of the medial epicondyle. There are several things that can cause pressure on the nerve at the elbow: The nerve is especially vulnerable to compression at the elbow because it must travel through a narrow space with very little soft tissue to protect it. In many cases of cubital tunnel syndrome, the exact cause is not known. It also controls most of the little muscles in the hand that help with fine movements, and some of the bigger muscles in the forearm that help you make a strong grip. The ulnar nerve gives feeling to the little finger and half of the ring finger. As the nerve enters the hand, it travels through another tunnel (Guyon’s canal). The spot where the nerve runs under the medial epicondyle is commonly referred to as the “funny bone.” At the funny bone the nerve is close to your skin, and bumping it causes a shock-like feeling.īeyond the elbow, the ulnar nerve travels under muscles on the inside of your forearm and into your hand on the side of the palm with the little finger. This bony bump is called the medial epicondyle. When the nerve compression occurs at the elbow, it is called “cubital tunnel syndrome.”Īt 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. The most common place where the nerve gets compressed is behind the elbow. Sometimes the ulnar nerve gets compressed at the wrist, beneath the collarbone, or as it comes out of the spinal cord in the neck. Depending upon where it occurs, this pressure on the nerve can cause numbness or pain in your elbow, hand, wrist, or fingers. It travels from your neck down into your hand, and can be constricted in several places along the way. The ulnar nerve is one of the three main nerves in your arm. Ulnar nerve entrapment occurs when the ulnar nerve in the arm becomes compressed or irritated.
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