There are several globally recognized tools used to monitor the severity of dystonia. The Burke-Fahn-Marsden Dystonia Rating Scale (BFMDRS) is a 120-point rating scale used to test the severity of dystonia in 9 body regions. This scale takes into account the severity and frequency of the dystonic movements. A higher score means greater impairment. The Toronto Western Spasmodic Torticollis Rating Scale (TWSTRS) is another commonly used rating scale for cervical dystonia. This exam consists of three sections: Severity (range 0-30), Disability (range 0-30), and Pain (range 0-40). Similar to the BFMDRS, a higher score indicates greater impairment from the disease. Multiple studies have demonstrated a reduction in BFMDRS and TWSTERS scores following deep brain stimulation therapy.