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- Title
Representing the Forest before the Trees: A Global Advantage Effect in Monkey Inferotemporal Cortex.
- Authors
Sripati, Arun P.; Olson, Carl R.
- Abstract
Hierarchical stimuli (large shapes composed of small shapes) have long been used to study how humans perceive the global and the local content of a scene-the forest and the trees. Studies using these stimuli have revealed a global advantage effect: humans consistently report global shape faster than local shape. The neuronal underpinnings of this effect remain unclear. Here we demonstrate a correlate and possible mechanism in monkey inferotemporal cortex (IT). Inferotemporal neurons signal the global content of a hierarchical display ~30 ms before they signal its local content. This is a specific expression of a general principle, related to spatial scale or spatial frequency rather than to hierarchical level, whereby the representation of a large shape develops in IT before that of a small shape. These findings provide support for a coarse-to-fine model of visual scene representation.
- Subjects
NEURONS; TEMPORAL lobe; CEREBRAL cortex; VISUAL perception; NEURAL circuitry; NERVOUS system; LABORATORY monkeys
- Publication
Journal of Neuroscience, 2009, Vol 29, Issue 24, p7788
- ISSN
0270-6474
- Publication type
Article
- DOI
10.1523/JNEUROSCI.5766-08.2009