Dissociation of Unit Activity and Gamma Oscillations during Vocalization in Primate Auditory Cortex

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Figure 3.
Figure 3.

Population average responses in sites with suppressed and excited responses. A, Population average PSTH of MUA responses during vocalization for sites with significant vocalization-induced suppression (p < 0.05). SEM (shaded) and significant time bins (green represents reduced; orange represents increased) are shown. Number of sites is indicated. B, Population average γ responses for the suppressed sites shown in A. γ power is plotted for both total (black) and induced (blue) responses. C, D, PSTHs of MUA and γ activity for the smaller population of sites with vocalization-related excitation. E, Scatter plot comparing total γ power during vocalization with MUA responses across the population. MUA responses were z-score-normalized relative to baseline to compare responses across different sites. Mean γ responses, binned by MUA, are shown (orange). Error bars indicate bin SEM. Filled symbols represent significant bins (p < 0.05; signed-rank, FDR-corrected). Induced γ (F) and onset-evoked γ (G) are similarly plotted, showing correlations between induced γ and vocal suppression, and between evoked γ and increased MUA onset activity.

  1. The Journal of Neuroscience vol. 40 no. 21 4158-4171
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