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Fig. 2 | Journal of Neurodevelopmental Disorders

Fig. 2

From: Altered modulation of gamma oscillation frequency by speed of visual motion in children with autism spectrum disorders

Fig. 2

Grand average spectra of HGO response induced by drifting gratings in the TD and ASD groups. Spectra are shown for combined pair of MEG gradiometers that displayed maximal gamma response (MEG2112 and MEG2113). Horizontal axis—frequency (Hz), vertical axis—log-normalized power changes relative to baseline (dB). Blue line—1.2 °/s, green line—3.6 °/s, red line—6.0 °/s. Solid and dashed lines designate the TD and ASD group, respectively. Shaded and striped shaded areas represent standard error of the mean for the TD and ASD, respectively. Sensor level topographic maps of the high gamma-band (55–120 Hz, 0.4 to 1.2 s) activity in dB are shown in the upper left corner of the respective panel. Bottom panels show between-condition comparisons; strips below the plots indicate frequencies where power increase for the respective velocity exceeded that for the two other velocities (p < 0.05, FWE-corrected). Between-group comparisons for each velocity condition are shown in the rightmost panels. The strips designate significant group differences (p < 0.05, FWE-corrected). Note that the TD/ASD difference in velocity-specific HGO response is evident for the fast stimulus velocity (6.0 °/s) only. Although at the medium velocity (3.6 °/s) this difference was also significant at the uncorrected level as evident from the error bars, this effect did not survive FWE correction

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