Temporal dynamics of negative emotional memory reprocessing during sleep.

IF 5.8 1区 医学 Q1 PSYCHIATRY Translational Psychiatry Pub Date : 2024-10-13 DOI:10.1038/s41398-024-03146-w
Serik Tabarak, Ximei Zhu, Peng Li, Frederik D Weber, Le Shi, Yimiao Gong, Kai Yuan, Yanping Bao, Tengteng Fan, Suxia Li, Jie Shi, Lin Lu, Jiahui Deng
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Abstract

Memory reprocessing during sleep is a well-established phenomenon in numerous studies. However, it is unclear whether the intensity of memory reprocessing is consistently maintained throughout the night or exhibits dynamic changes. This study investigates the temporal dynamics of negative emotional memory reprocessing during sleep, with a specific focus on slow oscillation (SO)-spindle coupling and its role in memory reprocessing. In the first experiment (N = 40, mean age = 22.5 years), we detected the negative emotional memory reprocessing strength in each sleep cycle, we found that the 2nd sleep cycle after negative emotional memory learning constitute the most sensitive window for memory reprocessing, furthermore, SO-spindle coupling signals in this window plays a role in stabilizing negative emotional memory. To verify the role of SO-spindle coupling in negative emotional memory reprocessing, we utilized transcranial alternating current stimulation (tACS) to disrupt SO-spindle coupling during the 2nd sleep cycle (N = 21, mean age = 19.3 years). Notably, the outcomes of the tACS intervention demonstrated a significant reduction in the recognition of negative emotional memories. These findings offer new insights into the mechanisms that regulate emotional memory consolidation during sleep and may have implications for addressing psychiatric disorders associated with pathological emotional memory.

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睡眠中负面情绪记忆再处理的时间动态。
睡眠中的记忆再加工是众多研究中公认的一种现象。然而,记忆再处理的强度是在整个夜间持续保持还是呈现动态变化,目前尚不清楚。本研究调查了睡眠中负面情绪记忆再处理的时间动态,特别关注慢振荡(SO)-纺锤体耦合及其在记忆再处理中的作用。在第一个实验中(N = 40,平均年龄 = 22.5 岁),我们检测了每个睡眠周期中负性情绪记忆再处理的强度,发现负性情绪记忆学习后的第二个睡眠周期是记忆再处理最敏感的窗口期,而且该窗口期中的慢振荡-纺锤体耦合信号在稳定负性情绪记忆中发挥作用。为了验证SO-纺锤体耦合在负性情绪记忆再处理中的作用,我们利用经颅交变电流刺激(tACS)来破坏第二个睡眠周期中的SO-纺锤体耦合(21人,平均年龄19.3岁)。值得注意的是,经颅交变电流刺激(tACS)干预的结果表明,负面情绪记忆的识别能力显著下降。这些发现为研究睡眠期间情绪记忆巩固的调节机制提供了新的视角,并可能对解决与病理性情绪记忆相关的精神疾病产生影响。
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来源期刊
CiteScore
11.50
自引率
2.90%
发文量
484
审稿时长
23 weeks
期刊介绍: Psychiatry has suffered tremendously by the limited translational pipeline. Nobel laureate Julius Axelrod''s discovery in 1961 of monoamine reuptake by pre-synaptic neurons still forms the basis of contemporary antidepressant treatment. There is a grievous gap between the explosion of knowledge in neuroscience and conceptually novel treatments for our patients. Translational Psychiatry bridges this gap by fostering and highlighting the pathway from discovery to clinical applications, healthcare and global health. We view translation broadly as the full spectrum of work that marks the pathway from discovery to global health, inclusive. The steps of translation that are within the scope of Translational Psychiatry include (i) fundamental discovery, (ii) bench to bedside, (iii) bedside to clinical applications (clinical trials), (iv) translation to policy and health care guidelines, (v) assessment of health policy and usage, and (vi) global health. All areas of medical research, including — but not restricted to — molecular biology, genetics, pharmacology, imaging and epidemiology are welcome as they contribute to enhance the field of translational psychiatry.
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