Transcranial Direct Current Stimulation (tDCS) as an Adjunctive Treatment for Treatment Resistant Depression (TRD)

tDCS is a form of noninvasive transcranial stimulation of the brain by delivering low-intensity electrical current to the scalp through two electrodes. The Soterix Medical 1×1 Low Intensity Transcranial DC Stimulator Model 1300A (Soterix Medical, Inc., New York, NY, USA) device will be used in the study. The tDCS device is comprised of a small battery-operated control box that delivers the current through electrodes placed on the scalp, held in place by elastic bands or head straps and worn over the forehead like a headband.