The hand is a marvelous creation without question, but not all its parts are equal. If you curl your fingers into a fist, then try to straighten them out one at a time, you will find that the first two pop up obediently enough but the ring finger doesn’t seem to want to straighten out at all. Its position on the hand means that it can’t really contribute much to fine movement and so it has less in the way of discriminating musculature.
