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Fig. 2 | BMC Biology

Fig. 2

From: Attention decouples action potentials from the phase of local field potentials in macaque visual cortical area MT

Fig. 2

Example of spike-phase coupling (SPC). a An illustration of how SPC leads to inter-neuronal synchrony. Oscillatory curves on the top illustrate two cycles of a hypothetical LFP signal in a narrow frequency band. The spiking activity of two example neurons (artificial data) is shown in red and blue in two synchronized (spikes coupled to the LFP trough) and desynchronized (spikes distributed across LFP phases) conditions. b Sample trial data. MUA and LFPs, filtered to extract theta band (3–7 Hz) activity, in an example attended (right panel) and unattended (left panel) trial of a sample site from monkey H. Middle panel presents where the peak-to-peak amplitude of this sample site’s LFP (within 3–7 Hz) stands (shown by the red triangle) over the histogram of the peak to peaks across all sites recorded from. The peaks of the MUA and a representative neighboring time window around them are marked by the red crosses and gray bars, respectively. Note that the sample site presented here does not necessarily follow the population’s average preferred phase (see Fig. 6)

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