With bi-lateral lower extremity CRPS-1, I can still "solve" an ancient Zen koan* and produce for anyone interested the sound of one hand clapping, by flapping my fingers of my right (dominant) hand against the palm, about 4 -5 times a second. One of my sons can do this too, in addition to dropping down effortlessly into a full lotus position, legs crossed, both soles up.

So, in keeping with the theme of a large scale study of saliva from 5,000+ CRPS patients that Childrens' Hospital LA is now wrapping up - supported in part with a grant from the RSDSA - an aspect of this may well be in the genes.

Mike

*Formally: a paradox that transcends the logical or conceptual, the solution of which requires a shift to another level of comprehension. The Shambala Dictionary of Buddhism and Zen (1991) pp. 117-118.