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. 2018 Nov 22;12:837. doi: 10.3389/fnins.2018.00837

FIGURE 2.

FIGURE 2

Amplitudeof high gamma V1 oscillations is linked to simultaneous thalamic high gamma. (A) Example time-frequency analysis of V1 LFP, aligned on the presentation of 100 ms full-contrast checkerboard image. (B) Example time-resolved pairwise phase consistency analysis of oscillation phase synchronization between dLGN and V1. PPC is increased in the high gamma frequency range following checkerboard stimulus. (C) Example correlation analysis of (A,B) to identify V1 oscillations whose amplitude is dependent on synchronous thalamic oscillations across stimulus conditions. Asterisks indicate frequencies of significant correlation (p < 0.05). High gamma in V1 is strongly correlated with synchronous high gamma oscillations in dLGN, and strongly anti-correlated with synchrony in the alpha, beta, and low gamma ranges. (D) Group mean results (±SEM) for correlation analysis shown in (C). Blue lines show frequencies of significant positive PPC-amplitude correlations in individual mice. Red lines show frequencies of significant inverse PPC-amplitude correlation. All animals had significant correlations within the 50–90 Hz high gamma frequency range and significant inverse correlations in the alpha frequency range. At the peak high gamma frequency in V1, dLGN-V1 phase synchronization accounted for an average of 66.9% of the amplitude modulation, across animals.