Processing shape, motion and three-dimensional shape-from-motion in the human cortex.

Content Provider	Semantic Scholar
Copyright Year	2003
Abstract	Shape and motion are complementary visual features and each appears to be processed in unique cortical areas. However, object motion is a powerful cue for the perception of three-dimensional (3-D) shape, implying that the two types of information--motion and form--are well integrated. We conducted a series of fMRI experiments aimed at identifying the brain regions involved in inferring 3-D shape from motion cues. For each subject, we identified regions in occipital-temporal cortex that were activated when perceiving: (i) motion in unstructured random-dot patterns, (ii) 2-D and 3-D line drawing shapes, and (iii) 3-D shapes defined by motion cues (shape-from-motion, SFM). We found closely adjacent areas in the lateral occipital region activated by random motion and line-drawing shapes. In addition, we found that the SFM stimuli produced a greater MRI signal in only one of the areas identified with the random motion and line-drawing stimuli: the superior lateral occipital (SLO) region. High-resolution analysis showed that SFM objects and line drawings were processed in separate but adjacent sub-regions in SLO, suggesting that SLO codes object shape but retains topographic segregation based on shape cues. Expanding the analysis to the entire cortex identified a parietal area that had overlapping activation for both SFM and line drawings and increased MRI signal for 3-D versus 2-D shapes, suggesting this area is important for processing shape information.
File Format	PDF HTM / HTML
PubMed reference number	12679297v1
Volume Number	13
Issue Number	5
Journal	Cerebral cortex
Alternate Webpage(s)	http://courses.washington.edu/viscog/Research/Murray/Murray_CerebCortex_2003.pdf
Alternate Webpage(s)	http://courses.washington.edu/viscog/publications/Murray_CerebCortex_2003.pdf
Alternate Webpage(s)	http://redwood.berkeley.edu/bruno/papers/cereb-cortex.pdf
Alternate Webpage(s)	https://courses.washington.edu/viscog/publications/Murray_CerebCortex_2003.pdf
Alternate Webpage(s)	http://faculty.washington.edu/somurray/papers/murray-cc.pdf
Language	English
Access Restriction	Open
Subject Keyword	Bell Palsy CDISC SDTM Anatomical Location Terminology Cerebral cortex Drawings (art) Hartley Guinea Pig Josamycin KCNMA1 wt Allele Nevus sebaceous OJ Ab:PrThr:Pt:Ser:Ord Occipital lobe Parietal Lobe Perception Physical object Scanning Probe Microscopes (device) Temporal Lobe fMRI
Content Type	Text
Resource Type	Article