Figure 3.

Dynamic Reduction of Nondiagnostic Brain Features in the Occipital-Ventral Pathway.

(A and B) Dynamics of (A) nondiagnostic brain feature reduction and (B) diagnostic brain feature progression. For each observer, a plot shows the curves of maximum (A) nondiagnostic and (B) diagnostic brain feature representation (i.e., MI effect size) for each voxel between 0 and 400ms post stimulus, color-coded by ranked onset time (blue, early; magenta, midway; yellow, late). In (A), the vertical dashed lines represent the time (∼170 ms) at which the brain stops representing nondiagnostic features. Adjacent brain scatters locate the voxels associated with each curve using the same color code.

(C) Divergence of nondiagnostic and diagnostic feature representations. In each panel, brain regions comprise one column per observer, where each horizontal line represents one voxel from the region. Lines denote two voxel properties: the color denotes representation onset, and the length, representation duration. Adjacent white bars show median representation duration across all regions, organized by the y axis of MNI Euclidean distance of each voxel to the voxel of initial representation onset. The dashed white horizontal line shows the nondiagnostic wavefront extends ventrally in the LG up to the junction with the TG and FG, and dorsally with IPL and SPL (see regions shaded a lighter gray). The diagnostic wavefront extends further into the ventral (i.e., FG, ITG, MTG, and STG) and dorsal (i.e., IPL and SPL) (see pink to yellow colors). See also Figure S3, Video S1 and Table S2. Abbreviations: Cuneus (CU), lingual gyrus (LG), inferior occipital cortex (IOG), middle occipital gyrus (MOG), superior occipital gyrus (SOG), fusiform gyrus (FG), inferior temporal gyrus (ITG), middle temporal gyrus (MTG), superior temporal gyrus (STG), inferior parietal lobe (IPL), and superior parietal lobe (SPL).