A method and apparatus for diagnosing and treating neural dysfunction is disclosed. This device has the capability of delivering the therapeutic electrical energy to more than one treatment electrode simultaneously. In another exemplary embodiment, this device can perform EMG testing both before and after the therapeutic energy has been delivered, to assess whether the target nerve was successfully treated. In another embodiment, the device has the capability to record and store sensory stimulation thresholds both before and after treatment is described, which allows the clinician to accurately determine whether the target nerve has been desensitized. Energy control may achieved by simultaneously comparing the tip temperature of each treatment electrode to a set temperature selected by the operator, and regulating the therapeutic energy output to maintain the set temperature. In another embodiment, EMG, stimulation thresholds, and graphs of temperature versus time can be conveniently displayed on a two-dimensional graphics display.