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. Author manuscript; available in PMC: 2020 Oct 29.
Published in final edited form as: Neuroimage. 2020 Jun 13;220:117048. doi: 10.1016/j.neuroimage.2020.117048

Fig. 2. The Effect of ISI on Oscillatory Sensory Gating.

Fig. 2.

(Left): Virtual sensor data were extracted from the contralateral primary somatosensory cortex of each participant using the peak voxel in the grand-averaged image. (Middle): From these time series, gating ratios (response power to stimulus 2/response power to stimulus 1) were computed and subjected to statistical analysis with temporally-neighboring ISIs. Trials with electrical stimulations separated by 200 ms exhibited the smallest gating ratios (i.e., better gating), with larger ratios evident for trials with other ISIs. (Right): Relative amplitude of the response to the first and second stimulation separately is shown for each ISI at the top, with dark blue reflecting responses to the first stimulation and light blue reflecting the same for the second stimulation. The spectral specificity of sensory gating (i.e., peak gamma frequency) is shown at the bottom, with significant elevations in peak gamma frequency in response to the second stimulation compared to the first for trials with an ISI of 200–400 ms.