I know it under The Relaxation Response... that might not be the term you heard, but I'll bet it is the procedure??? http://www.ucop.edu/humres/eap/relaxationrespone.html

Here's another take on it: Progressive Muscle Relaxation http://www.chronic-pain-haven.com/relaxation.html

and this: http://www.satyamag.com/nov01/drier.html