The carpal tunnel
The carpal tunnel refers to the narrow part of the wrist that opens to the hand. The median nerve and flexor tendons run through the carpal tunnel, helping to give feeling and movement to our fingers and thumb. The carpal ligaments and wrist bones surround the carpal tunnel, creating a rigid boundary.
What is carpal tunnel syndrome?
Carpal tunnel syndrome is caused by the tunnel narrowing or the flexor tendons swelling with nowhere to go. This compresses the median nerve and reduces blood flow.
What are the symptoms of carpal tunnel syndrome?
The most common symptoms of carpal tunnel syndrome include:
- Numbness and tingling in the thumb and fingers or palm that can feel like pins and needles.
- Weakness in the muscles of the hands; difficulty gripping things.
- Swollen fingers.
- Nerve pain in your wrist or hand that can be severe.
- Pain that radiates up your arm.
What causes carpal tunnel syndrome?
Inflammation can cause the swelling that compresses the median nerve. A number of conditions can cause this and are linked to carpal tunnel syndrome, including:
- Diabetes
- Thyroid dysfunction
- Fluid retention in pregnancy
- High blood pressure
- Rheumatoid arthritis
- Wrist fractures
The condition can be aggravated by repeated motion of the wrist when using a keyboard or mouse, using hand tools or power tools for extended periods of time or overextending the wrist when typing or playing piano.
