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• W4229014080 endingPage "477" @default.
• W4229014080 startingPage "466" @default.
• W4229014080 abstract "The nucleus reuniens of the thalamus (RE) is an important node between the medial prefrontal cortex (mPFC) and the hippocampus (HPC). Previously, we have shown that its mode of activity and its influence in mPFC-HPC communication is dependent upon brain state. During slow-wave states, RE units are closely and rhythmically coupled to the ongoing mPFC-slow oscillation (SO), while during activated (theta) states, RE neurons fire in an arrhythmic and tonically active manner. Inactivating the RE selectively impoverishes coordination of the SO between mPFC and HPC and interestingly, both mPFC and RE stimulation during the SO cause larger responses in the HPC than during theta. It is unclear if the activity patterns within the RE across states may play a role in both phenomena. Here, we optogenetically excited RE neurons in a tonic fashion to assess the impact on mPFC-HPC coupling. This stimulation decreased the influence of mPFC stimulation in the HPC during SO states, in a manner similar to what is observed across state changes into theta. Importantly, this type of stimulation had no effect on evoked responses during theta. Perhaps more interestingly, tonic optogenetic excitation of the RE also decreased mPFC-HPC SO coherence. Thus, it may not be the integrity of the RE per se that is responsible for efficient communication between mPFC and HPC, but rather the particular state in which RE neurons find themselves. Our results have direct implications for how distant brain regions can communicate most effectively, an issue that is ultimately important for activity-dependent processes occurring during slow-wave sleep-dependent memory consolidation." @default.
• W4229014080 created "2022-05-08" @default.
• W4229014080 creator A5000299771 @default.
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• W4229014080 creator A5019295364 @default.
• W4229014080 date "2022-05-06" @default.
• W4229014080 modified "2023-10-16" @default.
• W4229014080 title "Tonic excitation of nucleus reuniens decreases prefrontal‐hippocampal coordination during slow‐wave states" @default.
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• W4229014080 doi "https://doi.org/10.1002/hipo.23420" @default.
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