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New Experiences Enhance Coordinated Neural Activity in the Hippocampus
Open accessAbstract
The acquisition of new memories for places and events requires synaptic plasticity in the hippocampus, and plasticity depends on temporal coordination among neurons. Spatial activity in the hippocampus is relatively disorganized during the initial exploration of a novel environment, however, and it is unclear how neural activity during the initial stages of learning drives synaptic plasticity. Here we show that pairs of CA1 cells that represent overlapping novel locations are initially more coactive and more precisely coordinated than are cells representing overlapping familiar locations. This increased coordination occurs specifically during brief, high-frequency events (HFEs) in the local field potential that are similar to ripples and is not associated with better coordination of place-specific neural activity outside of HFEs. As novel locations become more familiar, correlations between cell pairs decrease. Thus, hippocampal neural activity during learning has a unique structure that is well suited to induce synaptic plasticity and to allow for rapid storage of new memories.
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“They also occur conjointly with SW-Rs that are observed at somewhat lower rates during wakefulness than during SWS (159,191,870).”
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“Reactivations of hippocampal cell firing patterns occur also during waking when the animal rests after task performance or during brief pauses of active behavior like explo-ration or running in a maze (191, 268, 556, 673, 870; see Ref. 175 for a review).”
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“Wake reactivations were found to be particularly precise when the animal explores a novel environment, and the precision decreases when the animal becomes more and more familiar with the spatial task (191).”
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Metadata
- Authors
- Cheng, S., & Frank, L. M.
- Affiliations
- University of California, San Francisco (US)
- Corresponding author
- Frank, Loren M.
- Venue
- Neuron
- Publisher
- Elsevier BV
- Published
- 2008-01
- Volume
- 57
- Issue
- 2
- Pages
- 303-313
- ISSN
- 0896-6273 (ISSN-L)
- PMC
- PMC2244590
- OpenAlex
- W2143853187
- Cited by
- 286
- References
- 53
- Citations by year
- 2026: 12 · 2025: 25 · 2024: 14 · 2023: 18 · 2022: 14 · 2021: 19 · 2020: 18 · 2019: 24 · 2018: 23 · 2017: 13 · 2016: 14 · 2015: 11 · 2014: 22 · 2013: 10 · 2012: 11
- FWCI
- 6.57
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- www.elsevier.com/tdm/userlicense/1.0/ (tdm)
- www.elsevier.com/legal/tdmrep-license (tdm)
- www.elsevier.com/open-access/userlicense/1.0/ (vor, 2055 d)
- doi.org/10.15223/policy-017 (stm-asf)
- doi.org/10.15223/policy-037 (stm-asf)
- doi.org/10.15223/policy-012 (stm-asf)
- doi.org/10.15223/policy-029 (stm-asf)
- doi.org/10.15223/policy-004 (stm-asf)
- Locations
- Neuron (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- McKnight Foundation
- National Institutes of Health (MH080283)
- National Institute of Mental Health (R01MH080283, MH080283, P50MH077970, MH059733, MH 077970, R01MH059733)
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
- Keywords
- hippocampus, CA1, synaptic plasticity, neural coordination, place learning, novel environment, ripples, local field potentials, spatial activity, memory encoding
- MeSH terms
- Action Potentials, Animals, Behavior, Animal, Dose-Response Relationship, Radiation, Electric Stimulation, Hippocampus, Male, Models, Neurological, Nerve Net, Neuronal Plasticity, Neurons, Space Perception, Spatial Behavior, Statistics as Topic, Time Factors, Nonlinear Dynamics, Maze Learning, Rats, Long-Evans, Rats
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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