GPI and Dystonia: At age 37 she underwent bilateral GPi DBS with a 45% improvement of the BFM scale movement subscore (78 to 43) and a 36% improvement of the BFM disability subscore (22 to 14); Toronto Western Spasmodic Torticollis Rating Scale (TWSTRS) severity subscore improved by 17% (18 to 15) and pain completely resolved (13.75 to 0); pain was therefore most probably due to the dystonia.