Estimating Location without External Cues

Cheung, Allen (2014) Estimating Location without External Cues. PLoS Computational Biology, 10 10: e1003927.1-e1003927.11. doi:10.1371/journal.pcbi.1003927


Author Cheung, Allen
Title Estimating Location without External Cues
Journal name PLoS Computational Biology   Check publisher's open access policy
ISSN 1553-7358
Publication date 2014-10-01
Sub-type Article (original research)
DOI 10.1371/journal.pcbi.1003927
Open Access Status DOI
Volume 10
Issue 10
Start page e1003927.1
End page e1003927.11
Total pages 11
Place of publication San Francisco, CA United States
Publisher Public Library of Science
Language eng
Formatted abstract
The ability to determine one’s location is fundamental to spatial navigation. Here, it is shown that localization is theoretically
possible without the use of external cues, and without knowledge of initial position or orientation. With only error-prone
self-motion estimates as input, a fully disoriented agent can, in principle, determine its location in familiar spaces with 1-fold
rotational symmetry. Surprisingly, localization does not require the sensing of any external cue, including the boundary. The
combination of self-motion estimates and an internal map of the arena provide enough information for localization. This
stands in conflict with the supposition that 2D arenas are analogous to open fields. Using a rodent error model, it is shown
that the localization performance which can be achieved is enough to initiate and maintain stable firing patterns like those
of grid cells, starting from full disorientation. Successful localization was achieved when the rotational asymmetry was due
to the external boundary, an interior barrier or a void space within an arena. Optimal localization performance was found to
depend on arena shape, arena size, local and global rotational asymmetry, and the structure of the path taken during
localization. Since allothetic cues including visual and boundary contact cues were not present, localization necessarily
relied on the fusion of idiothetic self-motion cues and memory of the boundary. Implications for spatial navigation
mechanisms are discussed, including possible relationships with place field overdispersion and hippocampal reverse replay.
Based on these results, experiments are suggested to identify if and where information fusion occurs in the mammalian
spatial memory system.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Brain Institute Publications
Official 2015 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
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