Visual Surfaces Representation in Human MT+ and SPL

Friday, October 13, 2000 - 2:45pm - 3:30pm
Keller 3-180
Sheng He (University of Minnesota, Twin Cities)
Surface extraction is of great importance to visual function and visually guided action. Neurons in primate MT/V5 have been shown to be both direction and disparity selective. Using fMRI, we demonstrate that human MT+ respond more to two planes of oppositely moving random dots if the two planes are placed in different stereo depths. We also tested if the disparity sensitive areas are capable of encoding global surface structures. Results suggest that in addition to the MT+ areas, the Superior Parietal lobule (SPL) is most sensitive to the global structure of visual surface.