Figure 8.
The β/γ rhythm is stronger at the beginning than at the end of the up state. Shorter windows of data, aligned either at the onset or at the offset of the up state to cover only the initial (green) or late (blue) phases of the up state, were used to compute the cross-correlation and coherence between the LFP and membrane voltage, MUA or event trains. Cross-correlations for a given neuron yielded stronger signals for the initial fragment of the up state (A, C, E). Also, the coherence averaged over the population (n = 10) retained significance mostly for data in the early up state (B, D, F). In all panels, shading indicates the 95% CI of the estimate. Dashed lines in B, D, and F mark the upper 95% CI under the hypothesis of independence.