Figure 4. Calcium channel blockade eliminates only the anodal tDCS-induced after-effects on cortical excitability.

Blocking calcium channels with the aid of FLU resulted in complete abolition of the prolonged excitability enhancement caused by anodal tDCS in the PLC condition. Asterisks indicate significant differences between the drug conditions regarding identical current conditions and time points, filled symbols signify significant deviations from baseline in regard to each drug condition (Student's t test, two-tailed, repeated measures, P < 0.05). Error bars indicate s.e.m.