hi-q keto Your "carpal tunnel" is a space in the base of your palm that is formed by several wrist bones and a thick ligament. Imagine it like this: Make an "O" shape between your thumb and your index finger. Now, hold your arm in a way that forces your palm to be facing the ceiling. The bottom half of the circle is a group of bones. The top half of the circle is a ligament. You've just created a mock-up carpal tunnel.