Fig. 3.

Sensitivity to contrast in acoustic-phonetic features. a Electrode preferences for both context F1 (during context window) and target F1 (during target window) from a single example patient. Some populations display both target F1 selectivity and context F1 selectivity (marked with a black-and-white outline), indicating a general preference for higher or lower F1 frequency ranges. Others are only tuned for target F1 or context F1 (marked with a single black outline in their respective panels). Significance assessed at p < 0.05 uncorrected. b Mean (±1 s.e.m.) high-gamma activity at an example electrode (e2) from the example patient in panel a (conditions split as described in Fig. 2c). Activity is displayed for a time window encompassing the full trial duration (both precursor sentence and target word). Black bars represent significant time-clusters (p < 0.05; cluster-based permutation). c A relation exists between the by-electrode context preference and target preference: electrodes that display a preference for either high- or low-target F1 typically also display a preference for the same F1 range during the context