2022 Fiscal Year Final Research Report
Different role of REM and NonREM sleep for episodic memory modification
| Project/Area Number |
19H01776
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 10040:Experimental psychology-related
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
Kaida Kosuke 国立研究開発法人産業技術総合研究所, 情報・人間工学領域, 主任研究員 (80586264)
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 記憶 / 睡眠 |
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| Outline of Final Research Achievements |
The purpose of this study was to investigate the process of memory formation during sleep. In order to examine the consolidation and modification of memory, we used the split-half method, which divides nighttime sleep into the first half (non-REM sleep dominant) and the second half (REM sleep dominant). As memory tasks, an associative memory task and a hindsight bias task were adopted. The use of the hindsight bias task in sleep research is original in this study. As a result of the research, it was confirmed that memory consolidation more occurred during non-REM sleep than REM sleep, and memory alteration more occurred during REM sleep than non-REM sleep. In addition, it was found that memory consolidation occurs within a few hours, but memory transformation takes several days. This is one of the main results of this study, as no other study has quantified memory modification during sleep as hindsight bias.
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| Free Research Field |
実験心理学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究の結果、レム睡眠中に記憶の変容が生じている可能性が高いことが明らかになった。記憶の変容は、誤った意思決定の原因となり得る一方で、自然環境や社会環境へ合わせて記憶を変化適応させ、精神状態を良好に保つためになくてはならない機能でもある。その重要な機能にレム睡眠が関与していることが明らかとなったことの学術的意義は大きい。また、本研究の結果は、記憶の変容を伴う心理療法（認知行動療法など）の効果を促進するためにもレム睡眠が重要であることを示唆しており、この知見が社会に及ぼす意義は深いと考えられる。
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