Figure 6
Graphical representation of the two interpretative hypotheses of the results. A. A prolonged exposure to AtDCS would have raised the modification threshold (θm) reducing the probability of learning of the repeated visuo-spatial contexts. Bars represent the hypothetical difference between neuronal firing rate produced by new trials presentation and old trials presentation across the 13 blocks (each bar a block). Low performers would be more affected because of a general reduced difference in neuronal firing rate responses to new and old trials. B. Low performers would generally show a reduced difference between neuronal firing rate produced by new and old trials presentation with respect to high performers. This difference would be cancelled in low performers while still preserved in high performers after the indiscriminate increase in neuronal firing rate produced by AtDCS.
