Extended Data Figure 4. Timing of the selectivity to hierarchical orthographic stimuli in the passive viewing task.
(a) Temporal representations of the two archetypal components generated from NNMF of the z-scores of words against each non-word condition. (b) Spatial map of the NNMF decompositions of the z-score word selectivity (207 electrodes, 20 patients). (c) Spatiotemporal representation of word vs non-word selectivity (non-word normalized to word activity) for each of the letter-form conditions. Electrode selectivity profiles were grouped every 20 mm along the antero-posterior axis in Talairach space. Each condition shows an anterior-to-posterior spread of word selectivity (red). FF: False Font, IL: Infrequent Letters, FL: Frequent Letters, BG: Frequent Bigrams, QG: Frequent Quadrigrams.