Cited by 68Memory and Neural MechanismsNeural dynamics and brain functionEpilepsy research and treatment

Enhanced Oscillatory Activity in the Hippocampal–Prefrontal Network Is Related to Short-Term Memory Function after Early-Life Seizures

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Kleen, Jonathan K., Wu, Edie X., Holmes, Gregory L., Scott, Rod C., Lenck-Santini, Pierre-Pascal·2011·The Journal of Neuroscience

Abstract

Neurological insults during development are associated with later impairments in learning and memory. Although remedial training can help restore cognitive function, the neural mechanisms of this recovery in memory systems are largely unknown. To examine this issue, we measured electrophysiological oscillatory activity in the hippocampus (both CA3 and CA1) and prefrontal cortex of adult rats that had experienced repeated seizures in the first weeks of life, while they were remedially trained on a delayed-nonmatch-to-sample memory task. Seizure-exposed rats showed initial difficulties learning the task but performed similarly to control rats after extra training. Whole-session analyses illustrated enhanced theta power in all three structures while seizure rats learned response tasks before the memory task. While performing the memory task, dynamic oscillation patterns revealed that prefrontal cortex theta power was increased among seizure-exposed rats. This enhancement appeared after the first memory-training steps using short delays and plateaued at the most difficult steps, which included both short and long delays. Further, seizure rats showed enhanced CA1–prefrontal cortex theta coherence in correct trials compared with incorrect trials when long delays were imposed, suggesting increased hippocampal–prefrontal cortex synchrony for the task in this group when memory demand was high. Seizure-exposed rats also showed heightened gamma power and coherence among all three structures during the trials. Our results demonstrate the first evidence of hippocampal–prefrontal enhancements following seizures in early development. Dynamic compensatory changes in this network and interconnected circuits may underpin cognitive rehabilitation following other neurological insults to higher cognitive systems.

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Crossref · 10.1523/jneurosci.2196-11.2011

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  • Elevated prefrontal oscillations and hippocampal-prefrontal theta coherence could be observed after FLE.

    “Elevated prefrontal oscillations and hippocampal-prefrontal theta coherence could be observed after FLE [388].”

    From Development of prefrontal cortex (2022) · cites this paper as [388]

    The Results report elevated prefrontal power and CA1–prefrontal theta coherence in rats exposed to early-life seizures. The Methods (Animals and seizure model) specify a flurothyl-induced early-life seizure model and state that the rats had no subsequent spontaneous seizures; the paper does not establish these findings after FLE. (LLM, conf=0.86)

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Authors
Kleen, J. K., Wu, E. X., Holmes, G. L., Scott, R. C., & Lenck-Santini, P.-P.
Affiliations
Dartmouth College (US)
Venue
The Journal of Neuroscience
Published
2011-10-26
Volume
31
Issue
43
Pages
15397-15406
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2008357008
Cited by
68
References
62
Citations by year
2026: 2 · 2025: 3 · 2024: 6 · 2023: 3 · 2022: 5 · 2021: 6 · 2020: 4 · 2019: 4 · 2018: 1 · 2017: 4 · 2016: 7 · 2015: 4 · 2014: 4 · 2013: 8 · 2012: 7
FWCI
3.09
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)
  • UCL Discovery (University College London) (submittedVersion)
Funders
  • National Institute of Mental Health (R21MH086833)
  • National Institute of Neurological Disorders and Stroke (R01NS073083, R01NS044295, F30NS064624)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Health Sciences › Medicine › Psychiatry and Mental health › Epilepsy research and treatment
Keywords
early-life seizures, short-term memory, theta oscillations, gamma oscillations, hippocampal CA1, hippocampal CA3, prefrontal cortex, memory training, neuronal synchronization, cognitive rehabilitation
MeSH terms
Analysis of Variance, Animals, Biological Clocks, Conditioning, Operant, Disease Models, Animal, Electroencephalography, Female, Hippocampus, Male, Memory Disorders, Memory, Short-Term, Neural Pathways, Seizures, Spectrum Analysis, Rats, Sprague-Dawley, Prefrontal Cortex, Nonlinear Dynamics, Rats

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