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Cubital Tunnel Syndrome

Cubital tunnel syndrome and radial tunnel syndrome aren’t as familiar as their better-known relative –carpal tunnel syndrome but they also can cause severe pain, numbness, tingling, and muscle weakness in the hands and arms.

Cubital tunnel syndrome also known as ulnar neuropathy is caused by increased pressure on the ulnar nerve, which passes close to the skin’s surface in the area of the elbow commonly known as the “funny bone.”

You’re more likely to develop cubital tunnel syndrome if you:

  • Repeatedly lean on your elbow, especially on a hard surface
  • Bend your elbow for sustained periods, such as while talking on a cell phone or sleeping with your hand crooked under your pillow
  • Sometimes, cubital tunnel syndrome results from abnormal bone growth in the elbow or from intense physical activity that increases pressure on the ulnar nerve.

Symptoms of cubital tunnel syndrome include:

  • Pain and numbness in the elbow
  • Tingling, especially in the ring and little fingers
  • Weakness affecting the ring and little fingers
  • Decreased ability to pinch the thumb and little finger
  • Decreased overall hand grip
  • Muscle wasting in the hand
  • Claw-like deformity of the hand

If you have any of these symptoms, your doctor may be able to diagnose cubital tunnel syndrome by physical examination alone. He or she also may order a test called electromyography, a procedure in which electrodes placed into muscles and on the skin measure the health of muscles and the nerve cells that control them, to confirm the diagnosis, identify the area of nerve damage and determine the severity of the condition.