Figure 31.

Synchronous spikes from distant neurons can contribute substantially to LFP ripple oscillations. (A) The locations of neurons that spike during ripple periods are indicated by triangles in a top‐down view of the pyramidal layer (left), with colors indicating the 50‐µm wide rings from which the spikes originate. Voltage, Ve, traces are colored correspondingly, with contributions from each ring of cells adding cumulatively from the outside in. Stacked histograms above the potential traces show spike times. Averaged power spectra of the stratum pyramidale Ve from each individual ring. The insets indicate the proportions of the total Ve power at 150 Hz generated by each ring‐ or disk‐shaped subpopulation (i.e., the peak values of the power spectra, normalized by the power at 150 Hz in the full population). Reproduced after Schomburg et al. (2012).