Cited by 46Memory and Neural MechanismsNeurogenesis and neuroplasticity mechanismsNeuroscience and Neuropharmacology Research

Insensitivity of the hippocampus to environmental stimulation during postnatal development

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Waters, Nicholas S., Klintsova, Anna Y., Foster, Thomas C.·1997·The Journal of Neuroscience

Abstract

Development of cortical sensory systems is influenced by environmental experience during "sensitive periods," before onset of behavioral function. During these periods, synaptic plasticity is observed, and neuronal function shows increased responsiveness to environmental stimulation. Because the hippocampus is late to develop, and because it demonstrates synaptic plasticity before the onset of behavioral function, this experiment was designed to determine whether, like the sensory cortices, the hippocampus undergoes a period of enhanced responsiveness to the environment. Rats at three ages [postnatal day 16 (P16), P23, and P30] were tested on a hippocampally dependent task, spontaneous alternation, and exposed to a novel environment. They were then killed and processed for immunocytochemistry to Fos or for in vitro electrophysiology in hippocampal area CA1. Age-matched control subjects were killed immediately after removal from the home cage. Spontaneous alternation was only observed in the oldest (P30) animals. In these same animals, the environmental manipulation resulted in an increase in Fos-like immunoreactivity (FL-IR), relative to controls, and a decrease in the ability to induce long-term potentiation (LTP). In P16 and P23 animals, the environmental manipulation resulted in no differences in hippocampal FL-IR or LTP. These results suggest that, rather than showing increased responsiveness to the environment at these ages, the hippocampus is environmentally insensitive and that it is isolated from the effects of environmental stimuli. The hippocampus, a neural region important for higher cognitive function, may develop via a mechanism different from those observed in the primary sensory cortices.

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Crossref · 10.1523/jneurosci.17-20-07967.1997

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  • Stress-induced Fos-like immunoreactivity in cortical and amygdaloid nuclei and cortisol responses differ between adolescents and adults.

    “Neuronal circuitry as investigated by stress-induced Fos-like immunoreactivity in cortical and amygdaloid nuclei differs between adolescent and adults (Kellogg et al., 1998; Waters et al., 1997), as do cortisol responses (Walker et al., 2001).”

    From Impulsivity, frontal lobes and risk for addiction (2009) · cites this paper as Waters et al., 1997

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Authors
Waters, N. S., Klintsova, A. Y., & Foster, T. C.
Affiliations
  • University of Virginia (US)
  • University of Illinois Urbana-Champaign (US)
Venue
The Journal of Neuroscience
Published
1997-10-15
Volume
17
Issue
20
Pages
7967-7973
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2147622058
Cited by
46
References
69
Citations by year
2025: 1 · 2023: 1 · 2022: 1 · 2018: 1 · 2017: 1 · 2016: 3 · 2015: 2 · 2014: 2 · 2013: 4 · 2012: 1
FWCI
1.82
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 Institute of Neurological Disorders and Stroke (F32NS010115, NS31830, NS10115)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (T32HD007323, HD07323)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
hippocampus, postnatal development, environmental enrichment, sensitive period, synaptic plasticity, long-term potentiation, Fos-like immunoreactivity, spontaneous alternation, CA1, hippocampal development
MeSH terms
Aging, Animals, Animals, Newborn, Behavior, Animal, Electrophysiology, Environment, Hippocampus, Immunohistochemistry, Male, Synaptic Transmission, Physical Stimulation, Proto-Oncogene Proteins c-fos, Rats, Sprague-Dawley, Long-Term Potentiation, Rats

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