Phase-Coherence Transitions and Communication in the Gamma Range between Delay-Coupled Neuronal Populations
Figure 3
Collective oscillations of two coupled bidirectionally neural populations.
The inter-areal axonal delay between the two neuronal pools is zero. (A) LFP time trace of the two populations in a
interval, for an external mean rate of
. The inset shows the averaged time correlation of
LFP pairs. (B) Phase coherence between the LFPs of the two networks for varying frequency. The measure is averaged over
trials. The black dashed line represents the threshold (
) above which the phase coherence is considered significant (in red). (C) Time shift between the LFP oscillations of the networks for varying frequency. Red crosses show the time shifts corresponding to the frequencies at which the phase coherence is above threshold. The time shift is calculated as
, where
is the phase difference at the frequency
of maximum phase coherence. The gray bar delimits the gamma peak band (
). The measure is averaged over
trials.