![]() The National Institute of Neurological Disorders and Stroke (USA) indicates that carpal tunnel syndrome is "often the result of a combination of factors that increase pressure on the median nerve and tendons in the carpal tunnel, rather than a problem with the nerve itself".Ĭarpal tunnel syndrome has been associated with certain tasks including: What are the occupational factors of carpal tunnel syndrome? Back to top The fibrous tissue thickens the tendon sheath, and hinders tendon movement. Repeated episodes of inflammation cause fibrous tissue to form. ![]() In turn, the swelling squeezes the median nerve in the wrist or carpal tunnel. Failure of the lubricating system creates friction between the tendon and its sheath causing inflammation and swelling of the tendon area. It may not produce enough fluid or it may produce a fluid with poor lubricating qualities. With repetitive or excessive movement of the hand, the lubrication system may malfunction. Lubrication is essential for the normal and smooth functioning of the tendons. The inner wall of the sheaths contains cells that produce a slippery fluid to lubricate the tendons. The tendons of the hand are encased in sheaths, or sleeves through which the tendons slide. For example, when a person bends a finger, the tendon moves about two inches. How does carpal tunnel syndrome develop? Back to topīending the wrist or moving the fingers brings muscles and tendons into action. People with carpal tunnel syndrome experience difficulty in performing tasks such as unscrewing bottle tops, fastening buttons, or turning keys. This combination of symptoms is called carpal tunnel syndrome. Such injury results in sensations of numbness, tingling, pain, and clumsiness of the hand. Swelling of the tendons reduces the space in the tunnel and squeezes the median nerve which is softer than the tendons. In the carpal tunnel, the tendons of the fingers surround the median nerve. Figure 2 - The Carpal Tunnel with Tendon and Median Nerve
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