Figure 4.

Single-trial CSD events and their relationship with the instantaneous phase. A, Example of a wideband (WB) LFP response in one multi-electrode penetration. B, CSD responses derived from the LFPs in A. C, D, The above responses, bandpass filtered with a [7–11] Hz pass band. E, F, LFP and CSD signals, respectively, at a depth of 500 μm below the pia. The top three traces show the LFP bandpassed in the [16–26] Hz band, the middle three traces in the [7–11] Hz range like in C, and the three bottom traces are wideband as in A. The traces are color coded as a function of their phases, as indicated in inset to F: [0, π/2), yellow; [π/2, π), green; [π, 3π/2), blue; [3π/2, 2π), red. G, H, Phases of the LFP and CSD as in E and F, but here responses to 10 repetitions of the stimulus are shown (as color code only) to illustrate the reproducibility of phase resets across trials and frequency bands.