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Discrete and continuous mechanisms of temporal selection in rapid visual streams

Author

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  • Sébastien Marti

    (NeuroSpin Center, Commissariat à l’Energie Atomique
    Cognitive Neuroimaging Unit, Institut National de la Santé et de la Recherche Médicale, U992
    Université Paris-Sud 91405)

  • Stanislas Dehaene

    (NeuroSpin Center, Commissariat à l’Energie Atomique
    Cognitive Neuroimaging Unit, Institut National de la Santé et de la Recherche Médicale, U992
    Université Paris-Sud 91405
    Collège de France)

Abstract

Humans can reliably detect a target picture even when tens of images are flashed every second. Here we use magnetoencephalography to dissect the neural mechanisms underlying the dynamics of temporal selection during a rapid serial visual presentation task. Multivariate decoding algorithms allow us to track the overlapping brain responses induced by each image in a rapid visual stream. The results show that temporal selection involves a sequence of gradual followed by all-or-none stages: (i) all images first undergo the same parallel processing pipeline; (ii) starting around 150 ms, responses to multiple images surrounding the target are continuously amplified in ventral visual areas; (iii) only the images that are subsequently reported elicit late all-or-none activations in visual and parietal areas around 350 ms. Thus, multiple images can cohabit in the brain and undergo efficient parallel processing, but temporal selection also isolates a single one for amplification and report.

Suggested Citation

  • Sébastien Marti & Stanislas Dehaene, 2017. "Discrete and continuous mechanisms of temporal selection in rapid visual streams," Nature Communications, Nature, vol. 8(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-02079-x
    DOI: 10.1038/s41467-017-02079-x
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    Cited by:

    1. Katherine L. Hermann & Shridhar R. Singh & Isabelle A. Rosenthal & Dimitrios Pantazis & Bevil R. Conway, 2022. "Temporal dynamics of the neural representation of hue and luminance polarity," Nature Communications, Nature, vol. 13(1), pages 1-19, December.

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