Cited by 425Visual perception and processing mechanismsNeural dynamics and brain functionNeuroscience and Neuropharmacology Research

Small modulation of ongoing cortical dynamics by sensory input during natural vision.

Fiser, József, Chiu, Chiayu, Weliky, Michael·2004·Nature

Abstract

During vision, it is believed that neural activity in the primary visual cortex is predominantly driven by sensory input from the environment. However, visual cortical neurons respond to repeated presentations of the same stimulus with a high degree of variability. Although this variability has been considered to be noise owing to random spontaneous activity within the cortex, recent studies show that spontaneous activity has a highly coherent spatio-temporal structure. This raises the possibility that the pattern of this spontaneous activity may shape neural responses during natural viewing conditions to a larger extent than previously thought. Here, we examine the relationship between spontaneous activity and the response of primary visual cortical neurons to dynamic natural-scene and random-noise film images in awake, freely viewing ferrets from the time of eye opening to maturity. The correspondence between evoked neural activity and the structure of the input signal was weak in young animals, but systematically improved with age. This improvement was linked to a shift in the dynamics of spontaneous activity. At all ages including the mature animal, correlations in spontaneous neural firing were only slightly modified by visual stimulation, irrespective of the sensory input. These results suggest that in both the developing and mature visual cortex, sensory evoked neural activity represents the modulation and triggering of ongoing circuit dynamics by input signals, rather than directly reflecting the structure of the input signal itself.

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Crossref · 10.1038/nature02907

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27 of 27 references verified0 citation errors · 0 not checkable

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  • External stimuli only modulate the highly stochastic spontaneous firing activity of cortical networks of neurons.

    “several experimental studies arrive at the conclusion that external stimuli only modulate the highly stochastic spontaneous firing activity of cortical networks of neurons [7], [8].”
  • The brain is active even in the absence of task, primarily driven by internal dynamics, with external events modulating rather than determining the activity of the system.

    “This alternative perspective suggests that the brain is active even in the absence of task, primarily driven by internal dynamics, with external events modulating rather than determining the activity of the system (24)(25)(26)(27)(28).”

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Authors
Fiser, J., Chiu, C., & Weliky, M.
Affiliations
University of Rochester (US)
Corresponding author
Weliky, Michael
Venue
Nature
Published
2004-09
Volume
431
Issue
7008
Pages
573-578
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2107313868
Cited by
423
References
27
Citations by year
2026: 4 · 2025: 11 · 2024: 11 · 2023: 9 · 2022: 14 · 2021: 18 · 2020: 20 · 2019: 34 · 2018: 16 · 2017: 19 · 2016: 23 · 2015: 29 · 2014: 14 · 2013: 31 · 2012: 19
FWCI
10.09
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
  • National Science Foundation
  • National Institutes of Health
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
spontaneous neuronal activity, primary visual cortex, sensory evoked potentials, natural images, cortical dynamics, visual development, ferrets, neural variability, visual cortex maturation
MeSH terms
Action Potentials, Aging, Animals, Evoked Potentials, Visual, Ferrets, Neurons, Photic Stimulation, Saccades, Visual Cortex, Visual Perception

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