Fig. 3. Covariance map (upper-left graph, seen from above, with isopotential contour lines) of the data used in Fig. 2 at the moment with minimal p-value (448 ms post stimulus), and LORETA inverse solution of the covariance map. The LORETA solution was computed in 2394 cortical voxels (7 7 7 mm) of the digitized brain atlas of the Montreal Neurological Institute (MNI). The crosshair line indicates the point of maximal current source density, which was at Talairach coordinates x = 52, y = 67, z = 8, close to left BA 37, 19 and 39.
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