* Design: Randomized Clinical Trial. Objective: to determine the effects of virtual reality versus posterior tibial nerve stimulation and muscle activation exercises on the improvement of pelvic floor dysfunctions in women with multiple sclerosis.
* Methods and Measures: forty five women will be randomly assigned to one of three groups.
* Intervention: For 8-week, the group 1 will undergo treatment with virtual reality (2/week), the group 2 will receive posterior tibial nerve stimulation (2/week) and the group 3 will receive muscle activation exercises of the pelvic floor.
* Main Outcome Measures: assessment of pelvic floor muscles function (strength and muscle tone), urodynamic studies, and validated questionnaires data will be collected at baseline, and 1 week after the last therapy application. Mixed-model analyses of variance will be used to examine the effects of the treatment on each outcome measure.
