 - All volunteers will have a diagnosis of myogenous TMD based on the RDCTMD with moderate to severe pain in the masseter and temporal muscles rated by an expert dentist. To standardize the sample, the body mass index of all participants must be less than 25 kgm2, as the amount of adipose tissue between the electrode and surface of the muscle can affect that reading of the electromyographic EMG signal. All volunteers must also have an initial pain score greater than 3 points on the VAS. 