Fig. 2From: Transcranial direct current stimulation combined with physical or cognitive training in people with Parkinson’s disease: a systematic reviewSynthesis of results in relation to the additional effect of tDCS. Green = Additional effect of combined intervention; Yellow = No additional effect of the combined intervention; Red = Negative effect of the combined intervention; White = not assessed in the reviewed studies; A = Acute (Considered the immediate effect of a single session); C = Chronic (Considered the effect of repeated sessions). * Others include Quality of Life, fatigue, sleep disordersBack to article page