Figure 2.

Demonstration of extracting LFOs of neuronal activity and CBF fluctuations from ECoG and LDF signals at resting-state. (a) Detection of instant FP events rates by calculating the interevent-intervals between spontaneous FP spikes. (a′) The corresponding FP events rate spectrum of the instant FP events rate normalized by the total FP events number. (b) Detection of instant CBF fluctuations by calculating the time intervals between consecutive CBF fluctuations. (b′) The corresponding CBF fluctuation rate spectrum of the instant CBF fluctuation.