 One in four women reports bothersome symptoms of a pelvic floor disorder with 16 reporting urinary incontinence UI. Sacral neuromodulation SNM which is approved for men and women with urgency urinary incontinence UUI, urgency frequency syndrome, urinary retention and anal incontinence, is a procedure designed to deliver electrical pulses to the sacral nerves, thereby influencing the bladder, sphincters, and pelvic floor. SNM provides symptomatic relief in 70-86 of patients undergoing the procedure for UUI according to several recent prospective studies. Although the success rates are quite high, the precise mechanism of action of SNM in subjects with UUI remains unclear. Moreover, there are little data regarding specific patient characteristics that may serve as predictors for SNM success. 