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Modeling Higher-Order Correlations within Cortical Microcolumns

Figure 7

Experimental methods.

(a) Example recording site with lines indicating layer boundaries and a schematic drawing of the 32-channel probe. (b) Current source density (the second spatial derivative of the LFP) in response to a full-field flash stimulus, showing a strong current sink in layer IV and to a lesser degree in layer VI. CSD was used to assign layer boundaries. (c) Cross-correlation for one pair of cells across time, binned at 6.7 ms. Correlations fall off quickly as the time lag increases with a central peak extending indicated by dashed lines.

Figure 7

doi: https://doi.org/10.1371/journal.pcbi.1003684.g007