Just watched a tv programme about the anatomy of the human hand. It was on Tuesday on BBC4 at 9pm and is available on i-player for about two weeks.
Last year I had two lots of hand surgery, including Carpal Tunnel Release and a Tendon Transfer. This programme (called Dissection) showed, in detail, the insides of a human arm, wrist and fingers. It also explained that the strength of our fingers comes from the arm muscles. And there was lots about nerves, etc.
So if you aren't too squeamish, and you have had hand problems yourself, you could learn a lot from this programme.
Hope I am brave enough to watch the next one - all about feet!