Polarity Specific Suppression Effects of Transcranial Direct Current Stimulation for Tinnitus

This study shows they are still investigating tDCS. 175 subjects. No placebo control group. Assessment of sound level reduction and annoyance by the patient on a EVA. They think polarity and placement of electrodes gives specific results according to the laterality of the tinnitus: If your tinnitus is unilateral it is more likely to work but they have to work out how to place the electrodes according to the side of your tinnitus. Or i read too fast. Few responders. Chapter 3 is very interesting.

http://www.hindawi.com/journals/np/2014/930860/