tDCS studies positioning the relatively large electrodes (about 4 x 6 cm) according to the international 10-20 EF.G system is a very common method (s. Knoch et 21 2006; Fecteau ct al. 2007: Priori et al. 2008). Herwig et at. (2003) have shown Pimps 6 al 1 histition or the est: imprints tktepthv kri/I S