Cited by 204Neural dynamics and brain functionVisual perception and processing mechanismsNeural and Behavioral Psychology Studies

Neural circuit dynamics underlying accumulation of time-varying evidence during perceptual decision-making

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Wong, Kong-Fatt·2007·Frontiers in Computational Neuroscience

Abstract

How do neurons in a decision circuit integrate time-varying signals, in favor of or against alternative choice options? To address this question, we used a recurrent neural circuit model to simulate an experiment in which monkeys performed a direction-discrimination task on a visual motion stimulus. In a recent study, it was found that brief pulses of motion perturbed neural activity in the lateral intraparietal area (LIP), and exerted corresponding effects on the monkey's choices and response times. Our model reproduces the behavioral observations and replicates LIP activity which, depending on whether the direction of the pulse is the same or opposite to that of a preferred motion stimulus, increases or decreases persistently over a few hundred milliseconds. Furthermore, our model accounts for the observation that the pulse exerts a weaker influence on LIP neuronal responses when the pulse is late relative to motion stimulus onset. We show that this violation of time-shift invariance (TSI) is consistent with a recurrent circuit mechanism of time integration. We further examine time integration using two consecutive pulses of the same or opposite motion directions. The induced changes in the performance are not additive, and the second of the paired pulses is less effective than its standalone impact, a prediction that is experimentally testable. Taken together, these findings lend further support for an attractor network model of time integration in perceptual decision making.

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Crossref · 10.3389/neuro.10.006.2007

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  • Within each pyramidal neural group, strong recurrent excitatory connections can sustain persistent activity triggered by a transient preferred stimulus.

    “Within each pyramidal neural group, strong recurrent excitatory connections can sustain persistent activity triggered by a transient preferred stimulus.”

    From Decision Making in Recurrent Neuronal Circuits (2008) · cites this paper as Wong et al., 2007

  • The two neural groups compete through feedback inhibition from interneurons.

    “The two neural groups compete through feedback inhibition from interneurons.”

    From Decision Making in Recurrent Neuronal Circuits (2008) · cites this paper as Wong et al., 2007

  • In a two-pool version of the recurrent neural circuit model, subpopulations of spiking neurons are selective for two-choice alternatives.

    “In a two-pool version of the model, subpopulations of spiking neurons are selective for two-choice alternatives (e.g., A = left motion, B = right motion).”

    From Decision Making in Recurrent Neuronal Circuits (2008) · cites this paper as Wong et al., 2007

  • The impact of a brief motion pulse in addition to the random-dot stimulus was greater with an earlier onset time.

    “This prediction is also confirmed by the monkey experiment, which showed that the impact of a brief motion pulse in addition to the random-dot stimulus was greater with an earlier onset time (Huk and Shadlen, 2005; Wong et al., 2007).”

    From Decision Making in Recurrent Neuronal Circuits (2008) · cites this paper as Wong et al., 2007

  • In contrast to the recurrent circuit model, the LCA model predicts that later, not earlier, signals influence more the ultimate decision.

    “In fact, in contrast to the recurrent circuit model, the LCA model actually predicts that later, not earlier, signals influence more the ultimate decision, because an earlier pulse is gradually “forgotten” due to the leak and does not affect significantly the decision that occurs much later (Wong et al., 2007).”

    From Decision Making in Recurrent Neuronal Circuits (2008) · cites this paper as Wong et al., 2007

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Research works printed but not linked: 1

  1. Shadlen M. N. Gold J. I. (2004). The neurophysiology of decision-making as a window on cognition. In The Cognitive Neurosciences, 3rd edn, Gazzaniga M. S., ed. (Cambridge, MA, MIT).

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Authors
Wong, K.-F.
Venue
Frontiers in Computational Neuroscience
Published
2007
Volume
1
Pages
6-6
ISSN
1662-5188 (ISSN-L)
OpenAlex
W1993762087
Cited by
204
References
32
Citations by year
2026: 3 · 2025: 11 · 2024: 7 · 2023: 7 · 2022: 7 · 2021: 15 · 2020: 15 · 2019: 9 · 2018: 13 · 2017: 6 · 2016: 16 · 2015: 9 · 2014: 10 · 2013: 15 · 2012: 21
FWCI
4.84
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Computational Neuroscience (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Ulster University Research Portal (Ulster University) (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • Howard Hughes Medical Institute
  • Brandeis University
  • University of Texas at Austin
  • National Institutes of Health
  • National Institute of Mental Health (R01MH062349)
  • National Institute on Drug Abuse (R01DA016455)
  • National Eye Institute (R01EY011378)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
Keywords
perceptual decision making, time integration, recurrent neural circuits, attractor networks, lateral intraparietal area, motion direction discrimination, time shift invariance

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