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Extrinsic cues suppress the encoding of intrinsic cues

Sheth, Bhavin R. and Shimojo, Shinsuke (2004) Extrinsic cues suppress the encoding of intrinsic cues. Journal of Cognitive Neuroscience, 16 (2). pp. 339-350. ISSN 0898-929X. http://resolver.caltech.edu/CaltechAUTHORS:SHEjcn04

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Abstract

Remembering where objects are in space is fundamental to adaptive behavior. Little is known about how intact humans combine information from intrinsic (egocentric) and extrinsic (exocentric, allocentric, or landmark-based) coordinate systems to locate objects. Using a simple location estimation paradigm, this study finds that we mostly remember position in extrinsic coordinates. Intrinsic-coordinate-based mapping of space is less precise in the presence of landmarks or extrinsic cues than in their absence. Thus, not only do extrinsic frames of reference dominate internal representations of space, they suppress intrinsic-based representations as well. We speculate that this dominance-suppression hierarchy undercuts intersystem conflicts and underlies a single, undissociated spatial map in intact humans.


Item Type:Article
Additional Information:© 2004 The MIT Press. We thank Drs. Richard Andersen and Geraint Rees for kindly reviewing an earlier version of our manuscript.
Subject Keywords:PARIETAL CORTEX; VISUAL DIRECTION; PERCEPTION; SPACE; HAND; OBJECTS; NEURONS; MEMORY; COORDINATION; INFORMATION
Record Number:CaltechAUTHORS:SHEjcn04
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:SHEjcn04
Alternative URL:http://jocn.mitpress.org/cgi/content/abstract/16/2/339
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4745
Collection:CaltechAUTHORS
Deposited By: Lindsay Cleary
Deposited On:05 Sep 2006
Last Modified:26 Dec 2012 09:01

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