Function
The hand is a very intricate tool with which the individual can receive
information from the outside world and then act upon it. It must be supple,
sensate, pain-free and coordinated. There are several types of grip. The thumb
acts as a post against which the index finger moves for fine pinch (picking
up a pin). The little and ring fingers curl into the palm to provide power
grip (holding a hammer). The thumb moves to the side of the index finger for
key grip and to the tips of the index and middle fingers for chuck
grip (holding a pen). All of the fingers curl for hook grip (holding
a suitcase).