Cubital Tunnel Syndrome

About Cubital Tunnel Syndrome

Cubital tunnel syndrome refers to compression of the ulnar nerve in the elbow region, specifically at the medial epicondyle, where the nerve travels through a narrow space called the cubital tunnel. The familiar 'funny bone' sensation is, in fact, the ulnar nerve briefly being knocked. Persistent compression here mainly affects the little finger and ring finger, weakening fine hand movements.

There are three principal nerves in the arm: median, ulnar and radial. The ulnar nerve runs from the neck, down the arm, across the elbow and into the hand. It supplies sensation to the small finger and part of the ring finger and controls many fine finger movements. Elbow nerve compression can also occur higher up in the arm or at the wrist within Guyon's canal.

Cubital tunnel syndrome is usually triggered by increased pressure on the ulnar nerve at the elbow. Risk factors include leaning on armrests, prolonged elbow bending while working on a computer or sleeping, casts or splints, arthritis, bone spurs, cysts and previous fractures or dislocations. Repeated nerve snapping over the medial epicondyle can also lead to inflammation, pain and progressive nerve damage.

Compared with carpal tunnel syndrome, which mainly affects the thumb, index and middle fingers, cubital tunnel syndrome targets the little and ring fingers. Diagnosis at Kayakriti involves a detailed history, examination of forearm and hand muscles, sensation testing and Tinel's sign at the elbow, supplemented with nerve conduction studies. Management ranges from activity modification and splinting to nerve decompression with anterior transposition.

What to expect

• History focused on little and ring finger numbness and elbow posture.
• Examination of grip, pinch strength and forearm muscles.
• Tinel's sign at the elbow plus nerve conduction studies.
• Conservative care with night splints and activity modification.
• Cubital tunnel release with anterior transposition for severe cases.

Recovery

• Light office work usually resumes within one to two weeks of surgery.
• Lifting and heavy gripping are avoided for four to six weeks.
• Numbness improvement is often gradual over several weeks.
• Hand therapy supports return to fine motor and grip-intensive jobs.