Fig. 2: The maintenance of individual braille pattern information during the delay period of each working memory task.
From: Supramodal and cross-modal representations of working memory in higher-order cortex
a To examine the existence of individual braille pattern information, we derived discrimination indices for individual braille patterns as the difference between within-braille and between-braille correlations, based on voxel pattern similarity using the split-half correlation analysis method (see “Methods” for details). b The distribution of retained stimulus information during the delay period of within-modal (TT and VV) tasks (discrimination index > 0, p < 0.01, right-tailed, FDR-corrected). Common neural substrates for the maintenance of braille pattern information in the TT and VV tasks were found in the superior parietal cortex. lh left hemisphere, rh right hemisphere, S superior, I inferior, A anterior, P posterior, L lateral, M medial. c The distribution of retained sample stimulus information during the delay period of cross-modal (TV and VT) tasks (discrimination index > 0, p < 0.01, right-tailed, FDR-corrected). During these tasks, broader cortical areas, including the prefrontal cortex and inferior parietal cortex, along with the superior parietal cortex, were engaged in the maintenance of braille pattern information. d Based on the results of above (b, c), the areas of overlap between TT and VV tasks, excluding TV and VT areas, are colored cyan (TT ∩ VV ∩ TVC ∩ VTC), and the overlap areas of TV and VT tasks, excluding TT and VV areas, are depicted in yellow (TV ∩ VT ∩ TTC ∩ VVC) (C denotes complement of a set). The overlap areas of all tasks are colored magenta (TT ∩ VV ∩ TV ∩ VT). Black arrows pointing to specific brain regions highlight significant activation in the targeted areas.
