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  Attentional fluctuations induce shared variability in macaque primary visual cortex

Denfield, G., Ecker, A., Shinn, T., Bethge, M., & Tolias, A. (2018). Attentional fluctuations induce shared variability in macaque primary visual cortex. Nature Communications, 9: 2654, pp. 1-14. doi:10.1038/s41467-018-05123-6.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-C2BE-F Version Permalink: http://hdl.handle.net/21.11116/0000-0001-AC63-E
Genre: Journal Article

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 Creators:
Denfield, GH, Author
Ecker, AS, Author              
Shinn, TJ, Author
Bethge, M1, 2, Author              
Tolias, AS, Author              
Affiliations:
1Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              
2Research Group Computational Vision and Neuroscience, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497805              

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 Abstract: Variability in neuronal responses to identical stimuli is frequently correlated across a population. Attention is thought to reduce these correlations by suppressing noisy inputs shared by the population. However, even with precise control of the visual stimulus, the subject’s attentional state varies across trials. While these state fluctuations are bound to induce some degree of correlated variability, it is currently unknown how strong their effect is, as previous studies generally do not dissociate changes in attentional strength from changes in attentional state variability. We designed a novel paradigm that does so and find both a pronounced effect of attentional fluctuations on correlated variability at long timescales and attention-dependent reductions in correlations at short timescales. These effects predominate in layers 2/3, as expected from a feedback signal such as attention. Thus, significant portions of correlated variability can be attributed to fluctuations in internally generated signals, like attention, rather than noise.

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 Dates: 2017-092018-07
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1038/s41467-018-05123-6
BibTex Citekey: DenfieldESBT2017
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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 9 Sequence Number: 2654 Start / End Page: 1 - 14 Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723