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research article

Feature fusion reveals slow and fast visual memories

Scharnowski, Frank
•
Hermens, Frouke
•
Kammer, Thomas
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2007
Journal of cognitive neuroscience

Although the visual system can achieve a coarse classification of its inputs in a relatively short time, the synthesis of qualia-rich and detailed percepts can take substantially more time. If these prolonged computations were to take place in a retinotopic space, moving objects would generate extensive smear. However, under normal viewing conditions, moving objects appear relatively sharp and clear, suggesting that a substantial part of visual short-term memory takes place at a nonretinotopic locus. By using a retinotopic feature fusion and a nonretinotopic feature attribution paradigm, we provide evidence for a relatively fast retinotopic buffer and a substantially slower nonretinotopic memory. We present a simple model that can account for the dynamics of these complementary memory processes. Taken together, our results indicate that the visual system can accomplish temporal integration of information while avoiding smear by breaking off sensory memory into fast and slow components that are implemented in retinotopic and nonretinotopic loci, respectively.

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Type
research article
DOI
10.1162/jocn.2007.19.4.632
Author(s)
Scharnowski, Frank
Hermens, Frouke
Kammer, Thomas
Oğmen, Haluk
Herzog, Michael H.  
Date Issued

2007

Publisher

Massachusetts Institute of Technology Press

Published in
Journal of cognitive neuroscience
Volume

19

Issue

4

Start page

632

End page

41

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPSY  
Available on Infoscience
March 23, 2010
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/48492
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