Clinical Comparison between HD-tDCS and tDCS for Improving Upper Limb Motor Function: A Randomized, Double-Blinded, Sham-Controlled Trial

Figure 1

Treatment of patients with HD-tDCS, a-tDCS, and sham stimulation. Red denotes anodal stimulation, whereas blue denotes cathodal stimulation. (a) Conventional a-tDCS was performed using two 5 cm × 7 cm isotonic saline gelatin sponges with two 5 cm × 5 cm rubber electrodes in a 10–20 EEG cap and (b) HD-tDCS was performed using EEG-sized electrodes held in plastic insets in a 10–20 EEG cap. A 4 × 1 channel HD-tDCS prototype device was used in the study. EEG, electroencephalogram; HD-tDCS, high-definition transcranial direct current stimulation; and a-tDCS, anodal transcranial direct current stimulation.

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