Median nerve

The median nerve is one of the main nerves of the arm. It runs from the forearm through the wrist into the hand. The U.S. National Library of Medicine describes it as the nerve that gives feeling and movement to parts of the hand ¹.

The median nerve passes through the wrist

The nerve reaches the hand through the wrist, where it shares a narrow space with the tendons that bend the fingers. Because the space is tight, the nerve is exposed to pressure there. Carpal tunnel syndrome is the condition that arises when that space puts pressure on the nerve.

Pressure on the median nerve causes carpal tunnel syndrome

Carpal tunnel syndrome is excessive pressure on the median nerve at the wrist ¹. The condition is often described by its symptoms in the hand, but the underlying problem is the nerve itself. Night-time splinting is a common first step. The NHS advises wearing a wrist splint at night to relieve pressure on the nerve, and says it may take up to 6 weeks before symptoms start to improve ².

Why the median nerve matters for typing and dictation

Keyboard and mouse work keeps the wrist in one position for long periods, which is one reason people with carpal tunnel syndrome are advised to change how they work. Typing itself does not have a proven link to the condition, as the evidence described in repetitive strain injury shows. Dictation can reduce how many keystrokes your hands make, which may lower the demand on the wrist. It does not treat the nerve, so a splint, a clinician's advice and a regular break routine still matter.

Related terms and guides

Related terms: repetitive strain injury (RSI), tendinitis, De Quervain's tenosynovitis, dictation.

Guides that cover the nerve and its condition:

• Carpal Tunnel Syndrome: Symptoms, Causes and Typing
• Carpal Tunnel Treatment: Splints, Exercises and Surgery
• Dictation for RSI and Carpal Tunnel: Type Less by Voice