Young aphasia case study: Event-related fields and sources of early visual evoked responses in A. and control

ERFs over occipital sensors for control (top) and A. (bottom), displayed between -200 and 700 ms. For Control, three surrogate conditions are depicted in blue, together with the overall average in red. For A., ERFs for successful naming are depicted in purple and for trials with word-finding problems in green, together with control’s average (red) for comparison. The time windows selected for topographical maps and source localisation are indicated for both participants. The source maps (below the ERFs) have values thresholded at t more extreme than ±2 and Cohen’s d more extreme than ±0.2 (white masks in the colour bars).

Coronal slices are depicted in neurological convention (i.e., left hemisphere on the left-hand side). L = left; R = right.