> "Human fingers only have a very narrow range of motion in a single direction" Each finger has three joints that can bend in and a little bit back. Each finge

> "Human fingers only have a very narrow range of motion in a single direction" Each finger has three joints that can bend in and a little bit back. Each finger can move from side to side. There is a small amount of rotation around the base of the finger. The thumb has three joints, the bottom of which is opposable to create a gripping hand. The entire hand can bend, yaw and rotate with respect to the arm, and there is further flexibility in the bones of the palm. If you doubt how complicated the hand is, download a free 3D figure posing system like Daz Studio [1], instantiate a figure, and then try to make a hand grip a small object, or gesture (e.g. v-sign, 'ok', hitchhiking, vulcan greeting). [1] https://www.daz3d.com/ https://www.daz3d.com/