I don't know about diagnosis, but here's a link for lumbosacral stabilization techniques: http://www.filefactory.com/file/e47c70/n/0542_RehDyStaLSSp_rar it is called: Rehabilitation in the dynamic stabilization of the lumbosacral spine by M. Tenucci, C. Giovannini, G. Calvosa, G. Dubois