[Non-invasive direct current stimulation of the brain: a new technique for stroke rehabilitation]. 
Experimental studies suggest that the non-invasive brain stimulation technique transcranial direct current stimulation (tDCS) may potentiate rehabilitation following stroke and lead to improved motor function.  This effect is believed to be due to correction of imbalanced interhemispheric inhibition.  The results of recent trials are promising, but optimal stimulation paradigms are yet to be determined and further investigations are required, before tDCS can be recommended for stroke rehabilitation.