Cited by 32Visual perception and processing mechanismsNeurogenesis and neuroplasticity mechanismsNeuroscience and Neuropharmacology Research

Enhancement of visual cortex plasticity by dark exposure

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Erchova, Irina, Vasalauskaite, Asta, Longo, Valentina, Sengpiel, Frank·2017·Philosophical Transactions of the Royal Society B: Biological Sciences

Abstract

Dark rearing is known to delay the time course of the critical period for ocular dominance plasticity in the visual cortex. Recent evidence suggests that a period of dark exposure (DE) may enhance or reinstate plasticity even after closure of the critical period, mediated through modification of the excitatory–inhibitory balance and/or removal of structural brakes on plasticity. Here, we investigated the effects of a week of DE on the recovery from a month of monocular deprivation (MD) in the primary visual cortex (V1) of juvenile mice. Optical imaging of intrinsic signals revealed that ocular dominance in V1 of mice that had received DE recovered slightly more quickly than of mice that had not, but the level of recovery after three weeks was similar in both groups. Two-photon calcium imaging showed no significant difference in the recovery of orientation selectivity of excitatory neurons between the two groups. Parvalbumin-positive (PV+) interneurons exhibited a smaller ocular dominance shift during MD but again no differences in subsequent recovery. The percentage of PV+ cells surrounded by perineuronal nets, a structural brake on plasticity, was lower in mice with than those without DE. Overall, DE causes a modest enhancement of mouse visual cortex plasticity. This article is part of the themed issue ‘Integrating Hebbian and homeostatic plasticity’.

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Authors
Erchova, I., Vasalauskaite, A., Longo, V., & Sengpiel, F.
Affiliations
  • Cardiff University (GB)
  • ORCID (US)
Corresponding author
Sengpiel, Frank
Venue
Philosophical Transactions of the Royal Society B: Biological Sciences
Published
2017-03-05
Volume
372
Issue
1715
Pages
20160159
ISSN
  • 0962-8436 (ISSN-L)
  • 1471-2970
OpenAlex
W2576200020
Cited by
32
References
40
Citations by year
2024: 5 · 2023: 4 · 2022: 4 · 2021: 4 · 2020: 4 · 2019: 4 · 2018: 4 · 2017: 3
FWCI
2.35
Type
journal article
Language
en
Open access
Locations
  • Philosophical Transactions of the Royal Society B Biological Sciences (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • ORCA Online Research @Cardiff (Cardiff University) (acceptedVersion)
Funders
Biotechnology and Biological Sciences Research Council (BB/J002089/1, BB/M021408/1)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
dark rearing, visual cortex plasticity, ocular dominance, critical period, monocular deprivation, primary visual cortex, parvalbumin interneurons, perineuronal nets, excitation-inhibition balance, orientation selectivity, Hebbian plasticity, homeostatic plasticity, juvenile mice
MeSH terms
Animals, Darkness, Female, Interneurons, Male, Neuronal Plasticity, Neurons, Random Allocation, Visual Cortex, Dominance, Ocular, Mice

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