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. 2011 Apr 6;31(14):5213–5224. doi: 10.1523/JNEUROSCI.6406-10.2011

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Copyright © 2011 the authors 0270-6474/11/315213-12$15.00/0

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Figure 5. — ERMF distribution underlying the N2pc at 290 ms (experiment 1). A, ERMF distribution of the N2pc (average over subjects) of the multiple- (top) and single- (bottom) distractor conditions 290 ms after search frame onset. The multiple-distractor condition shows an additional posterior occipital effect (solid ellipse) not present in the single-distractor condition. Field effects underlying the N2pc at 270 ms (compare Fig. 4) are marked by dashed ellipses. B, Current density distribution of the overall N2pc (top) in comparison to estimates computed based on the N2pc difference between the multiple- and the single-distractor conditions (estimates from the average ERMF response over subjects). The traces in the middle show the normalized time course of source activity obtained from the indicated locations (circles). The dashed contour in the lower map shows the distribution of the overall N2pc source activity at 270 ms as a comparison.