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Spatial updating in human parietal cortexSingle neurons in monkey parietal cortex update visual information in conjunction with eye movements. This remapping of stimulus representations is thought to contribute to spatial constancy. We hypothesized that a similar process occurs in human parietal cortex and that we could visualize it with functional MRI. We scanned subjects during a task that involved remapping of visual signals across hemifields. We observed an initial response in the hemisphere contralateral to the visual stimulus, followed by a remapped response in the hemisphere ipsilateral to the stimulus. We ruled out the possibility that this remapped response resulted from either eye movements or visual stimuli alone. Our results demonstrate that updating of visual information occurs in human parietal cortex.
Document ID
20040087591
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Merriam, Elisha P.
(University of Pittsburgh Pittsburgh, PA 15213, United States)
Genovese, Christopher R.
Colby, Carol L.
Date Acquired
August 21, 2013
Publication Date
July 17, 2003
Publication Information
Publication: Neuron
Volume: 39
Issue: 2
ISSN: 0896-6273
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: EY08098
CONTRACT_GRANT: EY12032
CONTRACT_GRANT: MH45156
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Neuroscience
Non-NASA Center

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