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- Carol L. Colby
- Department of Neuroscience and Center for the Neural Basis of Cognition, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
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- Michael E. Goldberg
- Laboratory of Sensorimotor Research, National Eye Institute, Bethesda, MD 20892
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<jats:p>▪ Abstract The space around us is represented not once but many times in parietal cortex. These multiple representations encode locations and objects of interest in several egocentric reference frames. Stimulus representations are transformed from the coordinates of receptor surfaces, such as the retina or the cochlea, into the coordinates of effectors, such as the eye, head, or hand. The transformation is accomplished by dynamic updating of spatial representations in conjunction with voluntary movements. This direct sensory-to-motor coordinate transformation obviates the need for a single representation of space in environmental coordinates. In addition to representing object locations in motoric coordinates, parietal neurons exhibit strong modulation by attention. Both top-down and bottom-up mechanisms of attention contribute to the enhancement of visual responses. The saliance of a stimulus is the primary factor in determining the neural response to it. Although parietal neurons represent objects in motor coordinates, visual responses are independent of the intention to perform specific motor acts.</jats:p>
収録刊行物
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- Annual Review of Neuroscience
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Annual Review of Neuroscience 22 (1), 319-349, 1999-03
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詳細情報 詳細情報について
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- CRID
- 1360855568648455424
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- NII論文ID
- 30022143612
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- NII書誌ID
- AA00541607
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- ISSN
- 15454126
- 0147006X
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