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. Author manuscript; available in PMC: 2008 Nov 3.
Published in final edited form as: Brain Res. 2006 Sep 7;1118(1):94–105. doi: 10.1016/j.brainres.2006.08.006

Table 3.

Peak latencies and mean peak values of the corresponding N90stg and P170stg deflections in the grand-average ERPs for each ISI and each attention condition (sub-columns). Grand-average ERPs were formed by averaging all individually averaged ERPs for each patient, which weighted the grand-average ERP equally across subjects rather than by number of epochs recorded. Asterisks denote significant differences determined via the bootstrap sampling procedure as described in Table 2. Rightmost column presents a measure of the “attention effect”, calculated as the percentage ratio of the mean peak difference (AT – AA) relative to the minimum (N90stg) or maximum (P170stg) mean peak value.

Grand-average ERP
Peak latency (msec) Mean peak value (μV)
ISI Component AT / AA AT / AA Attention effect (% Δ ~ peak)
400 msec N90stg 89.1 / 89.1 −14.4 / −11.4 ** 20.8
P170stg 173.7 / 169.7 11.6 / 8.7 ** 25
800 msec N90stg 89.1 / 89.8 −20.6 / −17.8 ** 13.6
P170stg 167.8 / 163.2 14.0 / 15.2 −7.9
2000 msec N90stg 88.5 / 89.8 * −26.6 / −27.9 −4.7
P170stg 173.7 / 165.8 21.4 / 21.0 1.9