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(A) Dual-task (DT)–related activation in stroke; thresholded images (Z > 2.3) of group for the positive interaction. Significant clusters defined according to extent (at corrected P < .01). (B) Group data (mean ± SD) of task-related changes in oxy-Hb concentrations in prefrontal cortex (PFC) during counting, ankle movement and DT as measured by near-infrared spectroscopy (NIRS) simultaneously with functional magnetic resonance imaging (fMRI).
