I recently had a "procedure" to get the ring fingure of my right hand back to normal. It was quite simple and involved a needle breaking up the nodules in my palm, thus allowing the finger to return to its usual position. But the contracture can return and so another "proceedure" will be needed. Just as a matter of interest, this condition seems to be prevalent in areas where the Vikings settled. As I am over 6' tall and used to have blonde hair (sadly now very white!)I can believe this. I didn't find that it stopped me playing clawhammer banjo, but it certainly got in the way when finger picking the guitar.