Focal dystonia is a painless hand condition in which the fingers either curl into the palm or extend outward without control. (There are also other forms of focal dystonia which can affect other parts of the body.) David suffered from this debilitating hand condition from 1984 to 1996. He cured himself completely by doing pioneering work with the large muscles of the armpit and shoulder. Many injured musicians from around the world have been helped by working with him and learning his methods.
Guitar Review magazine recently published David's article on "Curing Focal Dystonia, or How to Play the Guitar with Large Muscles". The article is full of detailed information on how David has cured himself and others of focal dystonia. It is in Guitar Review issue #133.
Details of David's personal experiences can be found in two older articles from Guitar Review and Classical Guitar magazines which are reproduced on this website: