Summary
Carpal tunnel syndrome is a “nerve entrapment” of the hand. If you look at the hand at the height of the wrist, you can see a wide band that stretches between the ball of the thumb and the ball of the little finger, directly above the wrist. This band represents the roof of a canal, namely the carpal tunnel.
This channel contains, among other things, an important nerve of the hand – the median nerve. In carpal tunnel syndrome, this very channel is too narrow. This puts pressure on the median nerve.