Fig. 1. Electrode coverage and category.

(A) Anatomical reconstructions of all participants. The locations of the ECoG electrodes were plotted with colored discs. The colors indicated the electrode categories (see Materials and Methods). (B) Venn diagram of all speech-responsive electrodes in all participants, broken down into four categories (nonresponsive category was not plotted). (C) The averaged high-γ responses regarding different lexical tones during tone production from five example electrodes, time-locked to speech onsets [electrode locations were plotted in (A) as stars in different colors]. Black dots indicated time points of significance. For the top row in (C), black dots indicated the time when there was a significant difference in the mean high-γ activity between the two syllables. (t test, P < 0.05, Bonferroni corrected). For the bottom row in (C), black dots indicated the time when there was a significant difference in the mean high-γ activity between the four tones. (F test, P < 0.05, Bonferroni corrected).