Effects of tDCS and TUS on the Perception of Pain and Functional Limitations Due to Non-Specific Chronic Low Back Pain

Subjects will receive 20 minutes of either active or sham tDCS at an intensity of 2 milliamps (mA). The anodal electrode will be placed over the primary motor cortex contralateral to the most painful side, and the cathodal electrode will be placed over the contralateral supraorbital area. In the sham group, the tDCS device will not be active for the full 20 minutes.

Subjects will receive 20 minutes of either active or sham TUS. During active stimulation the ultrasound will be active for the full 20 minutes- however, during sham stimulation the ultrasound will not be active for the full 20 minutes.