Attention to 3-D shape, 3-D motion, and texture in 3-D structure from motion displays.
We used fMRI to directly compare the neural substrates of three-dimensional (3-D) shape and motion processing for realistic textured objects rotating in depth. Subjects made judgments about several different attributes of these objects, including 3-D shape, the 3-D motion, and the scale of surface texture. For all of these tasks, we equated visual input, motor output, and task difficulty, and we controlled for differences in spatial attention. Judgments about 3-D shape from motion involve both parietal and occipito-temporal regions. The processing of 3-D shape is associated with the analysis of 3-D motion in parietal regions and the analysis of surface texture in occipito-temporal regions, which is consistent with the different behavioral roles that are typically attributed to the dorsal and ventral processing streams.
Peuskens
Hendrik
H
K.U. Leuven, Medical School, Belgium.
Claeys
Kristl G
KG
Todd
James T
JT
Norman
J Farley
JF
Van Hecke
Paul
P
Orban
Guy A
GA
D000328:Adult; D001288:Attention / Q000502:physiology; D004192:Discrimination, Psychological / Q000502:physiology; D005260:Female; D005403:Fixation, Ocular / Q000502:physiology; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D008297:Male; D009039:Motion Perception / Q000502:physiology*; D009415:Nerve Net / Q000502:physiology; D009778:Occipital Lobe / Q000502:physiology; D010296:Parietal Lobe / Q000502:physiology; D010775:Photic Stimulation; D011597:Psychomotor Performance / Q000502:physiology; D012399:Rotation; D013702:Temporal Lobe / Q000502:physiology