Cited by 307Neuroscience and Neuropharmacology ResearchVisual perception and processing mechanismsNeurogenesis and neuroplasticity mechanisms

The location and function of NMDA receptors in cat and kitten visual cortex

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Fox, K, Sato, H, Daw, N·1989·The Journal of Neuroscience

Abstract

The role of N-methyl-D-aspartate (NMDA) receptors in cat visual cortex was studied as a function of both layer and age by iontophoresis of the NMDA antagonist (D)-2-amino-5-phosphonovaleric acid (APV). Effects on both visual responses and spontaneous activity were observed. In superficial layers (II and III), D-APV reduced visual responses substantially at all ages. Iontophoresis of D-APV with 10 nA of ejecting current for 2–3 min was sufficient to reduce the response to approximately one third of control levels. The magnitude of the reduction did not vary with age. In granular and deep layers (IV, V, and VI), D-APV affected the visual response in young animals but only spontaneous activity in older animals. On average, visual responses were reduced to about half at 20–23 days of age and to about 75% at 4 weeks of age but in most cases were not significantly affected in adults. The rapid change in the functional effect of NMDA receptors over the third and fourth week in granular and deep layers suggests a role in development. There was a reasonable age correlation between the change in effect and the period of geniculocortical afferent segregation. Further experiments will be necessary to determine whether NMDA receptors are necessary for segregation to occur. The presence of an NMDA component to the visual response in the adult in layers II and III argues either that these layers retain some form of plasticity in the adult or that NMDA receptors play a role in the transmission of normal visual input to these layers.

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Crossref · 10.1523/jneurosci.09-07-02443.1989

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  • Together these findings suggest that the switch from NR2B to NR2A dominated receptors terminates the critical period of experience-dependent plasticity for establishment of ocular dominance columns in the visual cortex.

    “Together these findings suggest that the switch from NR2B to NR2A dominated receptors terminates the critical period of experience-dependent plasticity for establishment of ocular dominance columns in the visual cortex.”

    From A role for synaptic plasticity in the adolescent development of executive function (2013) · cites this paper as [107]

    In “Mechanisms for plasticity” (page not available), the paper reports that NMDA receptor activity in layer IV declines around the end of geniculocortical afferent segregation. It does not discuss an NR2B-to-NR2A switch or conclude that such a switch terminates the critical period; it says the critical period may outlast the decline in NMDA activity and that further experiments are needed to establish whether NMDA receptors are necessary for segregation. (LLM, conf=0.84)

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  1. Gilbert. C. D., and T. N. Wiesel (1981) Laminar specialisation and intracorticai connections in cat pnmaj visual cortex. In The Orga- nisation of the Cerebral Cortex. F. 0. Schmitt. F. G. Worden. G. Adelman,-and S. G. Dennis, eds., pp. 163-191, MIT Press, Cam- bridge, MA.

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Authors
Fox, K., Sato, H., & Daw, N.
Affiliations
Washington University in St. Louis (US)
Venue
The Journal of Neuroscience
Published
1989-07-01
Volume
9
Issue
7
Pages
2443-2454
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2166938907
Cited by
307
References
41
Citations by year
2025: 1 · 2024: 1 · 2023: 1 · 2022: 1 · 2020: 2 · 2019: 1 · 2017: 2 · 2016: 1 · 2015: 1 · 2014: 1 · 2013: 5 · 2012: 4
FWCI
9.22
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Eye Institute (EY-00053)
  • National Institute of Neurological Disorders and Stroke (NS18070)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
NMDA receptor, visual cortex, kitten development, D-APV, visual responses, spontaneous activity, cortical layers, synaptic plasticity, cats
MeSH terms
Aging, Animals, Cats, Dose-Response Relationship, Drug, Neurons, Tissue Distribution, Valine, Visual Cortex, 2-Amino-5-phosphonovalerate, Receptors, N-Methyl-D-Aspartate, Receptors, Neurotransmitter

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