Enriched environment modulates Sharp Wave-Ripple (SPW-R) activity in hippocampal slices
Behavioral flexibility depends on neuronal plasticity which forms and adapts the central nervous system in an experience-dependent manner. Thus, plasticity depends on interactions between the organism and its environment. A key experimental paradigm for studying this concept is exposure of rodents t...
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| Hauptverfasser: | , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2021
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| In: |
Frontiers in neural circuits
Year: 2021, Jahrgang: 15, Pages: 1-12 |
| ISSN: | 1662-5110 |
| DOI: | 10.3389/fncir.2021.758939 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.3389/fncir.2021.758939 Verlag, kostenfrei, Volltext: https://www.frontiersin.org/articles/10.3389/fncir.2021.758939/full 
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| Verfasserangaben: | Lucie Landeck, Martin E. Kaiser, Dimitri Hefter, Andreas Draguhn and Martin Both |
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| 245 | 1 | 0 | |a Enriched environment modulates Sharp Wave-Ripple (SPW-R) activity in hippocampal slices |c Lucie Landeck, Martin E. Kaiser, Dimitri Hefter, Andreas Draguhn and Martin Both |
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| 520 | |a Behavioral flexibility depends on neuronal plasticity which forms and adapts the central nervous system in an experience-dependent manner. Thus, plasticity depends on interactions between the organism and its environment. A key experimental paradigm for studying this concept is exposure of rodents to an enriched environment (EE), followed by studying differences to control animals kept under standard conditions (SC). While multiple changes induced by EE have been found at the cellular-molecular and cognitive-behavioral levels, little is known about EE-dependent alterations at the intermediate level of network activity. We therefore studied spontaneous network activity in hippocampal slices from mice which had previously experienced EE for 10-15 days. Compared to control animals from standard conditions (SC) and mice with enhanced motor activity (MC) we found several differences in sharp wave-ripple complexes (SPW-R), a memory-related activity pattern. Sharp wave amplitude, unit firing during sharp waves and the number of superimposed ripple cycles were increased in tissue from the EE group. On the other hand, spiking precision with respect to the ripple oscillations was reduced. Recordings from single pyramidal cells revealed a reduction in synaptic inhibition during SPW-R together with as reduced inhibition-excitation ratio. The number of inhibitory neurons, including parvalbumin-positive interneurons, was unchanged. Altered activation or efficacy of synaptic inhibition may thus underlie changes in memory-related network activity patterns which, in turn, may be important for the cognitive-behavioral effects of EE exposure. | ||
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