Figure 4.

Statistical comparison of the amplitude of the variables ΔV(t) and MUA for the occlusion condition compared to the amplitude of the sum of ΔV(t) and sum of MUA from the single bar conditions. The MUA was recorded from supragranular (S), granular (G), and infragranular (I) cortical layers at five sites along the 17/18 border (Top) and for the ΔV(t) at three sites along the 19/21 border, (Bottom) (Sites identical to those in Figure 3). Epochs where the amplitude of the ΔV(t) or MUA during the occlusion condition is significantly greater (p < 0.01) than the amplitude of the ΔV(t) sum or the MUA sum in the two single bar conditions are shown in red, and epochs where the amplitude of the ΔV(t) in the occlusion condition is significantly less (p < 0.01) than the amplitude of the sum of the ΔV(t) or sum of MUA in the single bar conditions are shown in blue.