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. Author manuscript; available in PMC: 2018 Jul 15.
Published in final edited form as: Brain Res. 2017 May 11;1667:28–40. doi: 10.1016/j.brainres.2017.05.005

Figure 5.

Figure 5

Follow-up nonparametric randomization test results for delay period alpha power (9-14Hz). Comparing the data by group, there was no significant difference between post- and pre-tDCS sessions for A) the Active tDCS group or B) the Sham tDCS group. Comparing the data by time point, C) there was no difference between groups prior to tDCS, but D) after tDCS the Active tDCS group showed significantly less alpha power in a cluster of posterior electrodes compared to the Sham tDCS group, which suggests greater neural efficiency after training for the Active group.