Have you ever heard of Dupuytren's Contracture? It is a "fixed flexion contracture of the hand where the fingers bend towards the palm and cannot be fully extended" (Wikipedia)
My grandfather and my dad both have this. My DH was watching a TV show on the Science Channel yesterday and learned that it is particularly prevalent in people of Viking descent, Northern Europeans and Scandinavians. The show said it probably originated with the Vikings and spread as they settled. It is most common in men (thank you, God). So if you or anyone in your family has this you are probably of Viking descent! My grandfather could not open his last 2 fingers on either hand. So my dad went looking for a way other than surgery to treat it. He did some research and found that taking a certain dose of Natural vitamin E has stopped its progress. He has the knots in his palm but his fingers are not curling. If anyone needs the dose let me know and I will ask him.
I just thought you might like to know that you could be a Viking like me!!