The ventral-stream object representation can take its shape cues from the dorsal-stream motion-flowfield representation
Brain regions active during structure-from-motion object recognition. (group analysis) are shown. Ins, Insula; IPL, inferior parietal lobule; LGN, lateral geniculate nucleus; Pul, pulvinar; SMG, supramarginal gyrus. Top, Orange to yellow regions are significantly active during SFM object recognition (compared with fixation periods during which only a small central cross was visible; extra-sum-of-squares F test for all classical and on-surface SFM predictors; p<0.001, corrected). Regions outlined in red are significantly more active during on-surface than during classical SFM conditions (t test; p<0.005; for details, see Materials and Methods). Regions significantly more active during classical than during on-surface SFM were not found (reverse contrast, same threshold). Outlined in black are the key regions hMT+, LOC (i.e., LO and pFs), and FFA as defined by separate localizer contrasts using appropriate stimuli including photos (see Stimuli in Materials and Methods). The thresholds all satisfy p<0.05 (corrected) but have been increased for hMT+ (p<0.005; corrected) and LO/pFs (p<0.0001; corrected) to select a t-map contour enclosing a plausible volume for each region. The numbers on the gray axes specify the Talairach location of the slices shown. Bottom, Glass-brain representations of the SFM-object-recognition network. Regions inside the rendered activation surfaces (red, blue, yellow, green) are highly significantly active during SFM object recognition (group results; p<4.14e-31; corrected). The large contiguous cortical expanse shown in blue is symmetrical with respect to the medial plane and includes early visual areas as well as the key regions hMT+, LOC, and FFA.