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Separate body- and world-referenced representations of visual space in parietal cortex

Snyder, Lawrence H. and Grieve, Kenneth L. and Brotchie, Peter and Andersen, Richard A. (1998) Separate body- and world-referenced representations of visual space in parietal cortex. Nature, 394 (6696). pp. 887-891. ISSN 0028-0836. doi:10.1038/29777.

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In order to direct a movement towards a visual stimulus, visualspatial information must be combined with postural information. For example, directing gaze (eye plus head) towards a visible target requires the combination of retinal image location with eye and head position to determine the location of the target relative to the body. Similarly, world-referenced postural information is required to determine where something lies in the world. Posterior parietal neurons recorded in monkeys combine visual information with eye and head position. A population of such cells could make up a distributed representation of target location in an extraretinal frame of reference. However, previous studies have not distinguished between world-referenced and body-referenced signals. Here we report that modulations of visual signals (gain fields) in two adjacent cortical fields, LIP and 7a, are referenced to the body and to the world, respectively. This segregation of spatial information is consistent with a streaming of information, with one path carrying body-referenced information for the control of gaze, and the other carrying world-referenced information for navigation and other tasks that require an absolute frame of reference.

Item Type:Article
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Andersen, Richard A.0000-0002-7947-0472
Additional Information:© 1998 Macmillan Publishers Ltd. Received 20 April; accepted 9 June 1998. We thank G. Roberts and B. Gillikin for technical assistance, and S. Gertmenian for editorial assistance. This work was supported by the Della Martin, McDonnell-Pew and Sloan foundations, the National Eye Institute and the Office of Naval Research.
Funding AgencyGrant Number
Della Martin FoundationUNSPECIFIED
McDonnell-Pew FoundationUNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
National Eye InstituteUNSPECIFIED
Office of Naval Research (ONR)UNSPECIFIED
Issue or Number:6696
Record Number:CaltechAUTHORS:20150616-142745348
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Official Citation:Snyder, L., Grieve, K., Brotchie, P. et al. Separate body- and world-referenced representations of visual space in parietal cortex. Nature 394, 887–891 (1998).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:58288
Deposited By: Tony Diaz
Deposited On:16 Jun 2015 21:54
Last Modified:10 Nov 2021 22:02

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