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Hirotaka Asai

As seen in: Nature, Science Magazine, BioRxiv
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Articles

Parallel processing of past and future memories through reactivation and synaptic plasticity mechanisms during sleep - Nature Communications

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By Khaled Ghandour, Tatsuya Haga, Noriaki Ohkawa, Masanori Nomoto, Hirotaka Asai, Tomoki Fukai
| Nature Verified
Abstract Every day, we experience new episodes and store new memories. Although memories are stored in corresponding engram cells, how different sets of engram cells are selected for current and next episodes, and how they create their memories, remains unclear. Here we show that in male mice, hippocampal CA1 neurons show an organized synchronous activity in prelearning home cage sleep that correlates with the learning ensembles only in engram cells, termed preconfigured ensembles.
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Dentate Neurogenesis Modulates Dorsal Hippocampal Excitation/Inhibition Balance Crucial for Cognitive Flexibility

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By Haowei Li, Risako Tamura, Daiki Hayashi, Hirotaka Asai
| BioRxiv
Abstract Adult neurogenesis endows the hippocampus with unparalleled neural plasticity, essential for intricate cognitive functions. However, the manner in which sparse newborn neurons (NBNs) modulate neural activities and subsequently shape behavior remains enigmatic.
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Dentate neurogenesis mediates cognitive flexibility via modulation of the hippocampal longitudinal-axis network

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By Haowei Li, Risako Tamura, Daiki Hayashi, Hirotaka Asai
| BioRxiv
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