Alpha power and high gamma power changes time-locked to sentence onset. A, Spectrogram (time-frequency) representations of power in the 2–30 Hz frequency range across all pmHG (left) and alHG (right) contacts in all hemispheres. White outlines indicate a significant difference from zero (p ≤ 0.05, uncorrected). B, Power in the alpha (7–10 Hz) range. Data points reflect individual hemispheres, and box-and-whiskers indicate the semi-interquartile and full range (*p ≤ 0.05). C, Alpha power time course (median across hemispheres; error bar reflects the semi-interquartile range). D, Low-frequency power spectrum (median across hemispheres; error bar reflects the semi-interquartile range). Black line marks significant differences between pmHG and alHG (p ≤ 0.05; FDR-corrected). E–H, Same as A–D but for the high-frequency range.