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• W2788344929 endingPage "3038" @default.
• W2788344929 startingPage "3026" @default.
• W2788344929 abstract "Gamma oscillations are involved in long-range coupling of distant regions that support various cognitive operations. Here we show in adult male rats that synchronized bursts of gamma oscillations bind the hippocampus (HPC) and prefrontal cortex (mPFC) during slow oscillations and slow-wave sleep, a brain state that is central for consolidation of memory traces. These gamma bursts entrained the firing of the local HPC and mPFC neuronal populations. Neurons of the nucleus reuniens (NR), which is a structural and functional hub between HPC and mPFC, demonstrated a specific increase in their firing before gamma burst onset, suggesting their involvement in HPC–mPFC binding. Chemical inactivation of NR disrupted the temporal pattern of gamma bursts and their synchronization, as well as mPFC neuronal firing. We propose that the NR drives long-range hippocampo–prefrontal coupling via gamma bursts providing temporal windows for information exchange between the HPC and mPFC during slow-wave sleep. SIGNIFICANCE STATEMENT Long-range coupling between hippocampus (HPC) and prefrontal cortex (mPFC) is believed to support numerous cognitive functions, including memory consolidation occurring during sleep. Gamma-band synchronization is a fundamental process in many neuronal operations and is instrumental in long-range coupling. Recent evidence highlights the role of nucleus reuniens (NR) in consolidation; however, how it influences hippocampo–prefrontal coupling is unknown. In this study, we show that HPC and mPFC are synchronized by gamma bursts during slow oscillations in anesthesia and natural sleep. By manipulating and recording the NR–HPC–mPFC network, we provide evidence that the NR actively promotes this long-range gamma coupling. This coupling provides the hippocampo–prefrontal circuit with a novel mechanism to exchange information during slow-wave sleep." @default.
• W2788344929 created "2018-03-06" @default.
• W2788344929 creator A5013330112 @default.
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• W2788344929 date "2018-02-19" @default.
• W2788344929 modified "2023-09-29" @default.
• W2788344929 title "The Nucleus Reuniens Controls Long-Range Hippocampo–Prefrontal Gamma Synchronization during Slow Oscillations" @default.
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• W2788344929 doi "https://doi.org/10.1523/jneurosci.3058-17.2018" @default.
• W2788344929 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6596069" @default.
• W2788344929 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29459369" @default.
• W2788344929 hasPublicationYear "2018" @default.
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