When considering the interaction of ‘DBS state x intensity’, the post hoc tests showed that dystonia patients had less effective SICI (=higher % of unconditioned MEP) than control subjects only with the 80–90% AMT intensity of the conditioning stimulus in both the GPi DBS OFF state (80% AMT intensity: z = 3.596, p < 0.01; 90% AMT intensity: z = 4.511, p < 0.001) and the GPi DBS ON state (80% AMT intensity: z = 3.197, p < 0.05; 90% AMT intensity: z = 4.486, p < 0.001) whereas no differences for the 70% AMT intensity were found (Fig. 1B). This evidence concerns the gene GPI and Dystonia.