Cubital tunnel syndrome: the elbow nerve compression desk workers get

Cubital tunnel syndrome is compression of the ulnar nerve at the medial elbow. The ulnar nerve passes through the cubital tunnel, a narrow canal between the medial epicondyle and the olecranon, and is compressed when the elbow is sustained in flexion.

Symptoms: tingling and numbness in the ring and little finger, inner forearm, and medial hand. In more severe cases, weakness of the intrinsic hand muscles and clawing of the ring and little finger.

Sustained elbow flexion during typing, sustained phone use (phone held against ear with elbow flexed), and leaning on the medial elbow all compress the ulnar nerve at the cubital tunnel. The nerve has minimal tolerance for sustained compression, symptoms develop within minutes in a provocative position.

Sustained elbow flexion at night (sleeping with arms bent) is also a common aggravating factor, many cubital tunnel patients wake with numb ring and little fingers.

Carpal tunnel syndrome affects the median nerve (thumb, index, middle finger). Cubital tunnel syndrome affects the ulnar nerve (ring and little finger). Tapping the medial elbow (cubital tunnel Tinel's test) reproduces the tingling in the hand. Elbow flexion test (sustained elbow flexion for 60 seconds) also reproduces symptoms.

Cervical radiculopathy (C8 root) can produce similar hand symptoms, differentiation requires cervical assessment and neurodynamic testing.

Elbow extension splinting at night prevents the sustained flexion that compresses the nerve during sleep. Workstation modification: keyboard position, phone use habits, avoidance of direct elbow pressure on the desk surface.

Ulnar nerve gliding exercises improve the nerve's mobility through the cubital tunnel and reduce mechanical sensitivity. For persistent or progressive symptoms (weakness, constant numbness), surgical opinion for ulnar nerve transposition is appropriate.