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Carpal Tunnel Syndrome: Step-By-Step

By Carol & Richard Eustice, About.com

Updated: December 12, 2006

About.com Health's Disease and Condition content is reviewed by Kate Grossman, MD

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Step 2 of 8 - What Else Is In The Tunnel?

The tunnel also contains nine tendons that connect muscles to bones and work to bend your fingers and thumb. These tendons are covered with a lubricating membrane called synovium. The synovium may enlarge and swell under certain conditions.

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