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Cortical activations during motor imagery of forward (blue) and backward (green) walking are overlaid on example anatomical slices from one individual (cf. Table 2). Overlapping regions are shown in blue-green. Only significant activations are shown with P-values corrected for multiple comparisons by false discovery rate (FDR, P < 0.05) and cluster threshold estimation using Monte Carlo simulations (alpha level = 0.05).
