Journal
JOURNAL OF NEUROSCIENCE
Volume 24, Issue 10, Pages 2551-2565Publisher
SOC NEUROSCIENCE
DOI: 10.1523/JNEUROSCI.3569-03.2004
Keywords
visual cortex; functional imaging; object processing; monkey; homology; cue invariance
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Funding
- NIMH NIH HHS [R01 MH060974, R01 MH60974] Funding Source: Medline
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We compared neural substrates of two-dimensional shape processing in human and nonhuman primates using functional magnetic resonance (MR) imaging in awake subjects. The comparison of MR activity evoked by viewing intact and scrambled images of objects revealed shape-sensitive regions in occipital, temporal, and parietal cortex of both humans and macaques. Intraparietal cortex in monkeys was relatively more two-dimensional shape sensitive than that of humans. In both species, there was an interaction between scrambling and type of stimuli (grayscale images and drawings), but the effect of stimulus type was much stronger in monkeys than in humans. Shape- and motion-sensitive regions overlapped to some degree. However, this overlap was much more marked in humans than in monkeys. The shape-sensitive regions can be used to constrain the warping of monkey to human cortex and suggest a large expansion of lateral parietal and superior temporal cortex in humans compared with monkeys.
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