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Neural ensemble decoding reveals a correlate of viewer- to object-centered spatial transformation in monkey parietal cortex

Crowe, DA; Averbeck, BB; Chafee, MV; (2008) Neural ensemble decoding reveals a correlate of viewer- to object-centered spatial transformation in monkey parietal cortex. Journal of Neuroscience , 28 (20) 5218 - 5228. 10.1523/JNEUROSCI.5105-07.2008. Green open access

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Abstract

The parietal cortex contains representations of space in multiple coordinate systems including retina-, head-, body-, and world-based systems. Previously, we found that when monkeys are required to perform spatial computations on objects, many neurons in parietal area 7a represent position in an object-centered coordinate system as well. Because visual information enters the brain in a retina-centered reference frame, generation of an object-centered reference requires the brain to perform computation on the visual input. We provide evidence that area 7a contains a correlate of that computation. Specifically, area 7a contains neurons that code information in retina- and object-centered coordinate systems. The information in retina-centered coordinates emerges first, followed by the information in object-centered coordinates. We found that the strength and accuracy of these representations is correlated across trials. Finally, we found that retina-centered information could be used to predict subsequent object-centered signals, but not vice versa. These results are consistent with the hypothesis that either area 7a, or an area that precedes area 7a in the visual processing hierarchy, is performing the retina- to object-centered transformation.

Type: Article
Title: Neural ensemble decoding reveals a correlate of viewer- to object-centered spatial transformation in monkey parietal cortex
Open access status: An open access version is available from UCL Discovery
DOI: 10.1523/JNEUROSCI.5105-07.2008
Publisher version: http://dx.doi.org/10.1523/JNEUROSCI.5105-07.2008
Language: English
Additional information: This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. The license allows you to copy, distribute, and transmit the work, as well as adapting it. However, you must attribute the work to the author (but not in any way that suggests that they endorse you or your use of the work), and cannot use the work for commercial purposes without prior permission of the author. If you alter or build upon this work, you can distribute the resulting work only under the same or similar license to this one. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/ or send a letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/46249
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