Part 2: How Does Carpal Tunnel Develop?

The muscles that move the fingers are attached to the bone via tendons. Segments of these tendons are situated inside the carpal tunnel. When the space inside this tunnel is constricted or decreased, the vacant area inside the carpal tunnel is much less. What results is a pinched median nerve which then results in a less effective nerve.

Picture it as if you were watering the garden with a hose, and then a kink occurs in the hose, decreasing the flow of water in comparison to before. That is what happens with the nerve, the efficiency of communication of the nerve, or in the case of the hose, the efficiency of the garden being watered, has decreased because the area that the water can flow decreases. .

This decreased in area in the carpal tunnel can occur because of inflammation of the tendons (tendinitis), or physically pushing on the flexor retinaculum which occurs when the wrists are rested on a hard desk surface and are bent forward, such as what happens sometimes when typing. These are only a few of many possible risk factors of carpal tunnel syndrome.

This ergo-tip is a part of an ergo-tip series about musculoskeletal injuries. Please visit the table of contents at for other available posts. There will be one post released every Tuesday.