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Experimental Effects of Acute Exercise on Cognitive-Based Short-Term memory Improvement:A Meta-analysis of Repeated Measures Studies

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Journal of Science in Sport and Exercise 2022年第1期4卷 12-20页

作者： Myungjin Jung Minsoo Kang Jeremiah Blough Paul D.Loprinzi Exercise and memory Laboratory Department of HealthExercise Science and Recreation ManagementThe University of MississippiUniversityMS 38677USA Health and Sport Analytics Laboratory Department of HealthExercise Science and Recreation ManagementThe University of MississippiUniversityMS 38677USA

The purpose of this meta-analysis was to evaluate the effects of acute exercise on short-term memory *** computerized literature searches using electronic databases and examinations of reference lists from relevant studies yielded six studies meeting our inclusionary *** a total of six studies,16 standardized regression coefficient effect sizes(ESs)were calculated to be *** meta-analyses showed a statistically significant increase in short-term memory improvement across both the exercise and non-exercise control groups in trials 1-5[ES=0.96,95%CI(0.95,0.97),Pmemory improvement to a greater extent than a non-exercise *** research is needed to further evaluate whether acute exercise enhances long-term memory via enhanced learning and/or post-learning mechanisms.

关键词： Acquisition memory encoding memory consolidation Physical activity

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海马体启发的与光照时长相关的记忆器件用于神经编码

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Science China Materials 2022年第4期65卷 1087-1093页

作者：李彩虹杜文刘和桩杨茂徐浩巫江王志明 Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu610054China School of Physics University of Electronic Science and Technology of ChinaChengdu610054China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu610054China

本文在海马体的启发下设计了一种与光照时长相关的记忆器件.与常规的持续性正/负电导不同,基于类网状二硫化钼沟道层的记忆器件表现出随光照时长逐渐降低的正光电导.由于光照下缺陷诱导的捕获陷阱会在阳极附近形成耗尽层,导致局部电场畸... 详细信息

本文在海马体的启发下设计了一种与光照时长相关的记忆器件.与常规的持续性正/负电导不同,基于类网状二硫化钼沟道层的记忆器件表现出随光照时长逐渐降低的正光电导.由于光照下缺陷诱导的捕获陷阱会在阳极附近形成耗尽层,导致局部电场畸变,从而使载流子分离效率净降低,该器件表现出随光照时长先增加后降低的光响应,而且再次光激发的响应电流低于前一次光激发的电流,即再次光激发读出电流与前一次光照时长相关.因此在405 nm激光光照下该器件可用于光照时长编码和模拟压力诱导下的完整记忆行为包括记忆编码、存储和再检索.此外,通过再引入450 nm激光可以实现光照时长编码的加密与解密,同时也可以进一步模拟压力引发的相应激素对记忆的影响.

关键词： illumination time memory trace pressure-induced memory behavior memory encoding memory retrieval

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Unconsciously Implanted Visuoauditory memory in the Presence of Cholecystokinin Retrieved in a Behaviorally Relevant Context

Unconsciously Implanted Visuoauditory Memory in the Presence...

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中国神经科学学会第十二届全国学术会议

作者： Zicong Zhang Christine Xuejiao Zheng Yujie Peng Xi Chen Yiping Guo Danyi Lu Xiao Li Wenjian Sun Peng Tang Sherry Ling He Min Li Qing Liu Fuqiang Xu Gabriel Ng Jufang He Departments of Biomedical Sciences and Biology and Chemistry City University of Hong Kong Department of Rehabilitation Sciences The Hong Kong Polytechnic University City University of Hong Kong Shenzhen Research Institute Guangzhou Institute of Biomedicine and Health Chinese Academy of Sciences Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences

We investigated whether an associative memory can be artificially implanted under anesthesia and then retrieved in a behaviorally relevant context. Rats with bilateral electrodes in the auditory cortex were trained to approach the left or the right hole of a behavioral apparatus to retrieve a reward depending on whether the right or left auditory cortex was electrically stimulated. Next, under anesthesia, a previously irrelevant visual stimulus（VS） was repeatedly paired with electrical stimulation of the auditory cortex（EAC） in the presence of cholecystokinin（CCK）, after which auditory cortex neurons started to respond to the light stimulus in both anesthetized and awake states. In subsequent behavioral testing, in response to the VS, rats approached the hole that was "engineered" to be associated with reward availability. High-frequency（HF） activation of the terminals of the entorhinal CCK neurons in the auditory cortex, which was followed by the pairing of the VS and EAC, enhanced neuronal responses to the VS in the auditory cortex of anesthetized mice. When the mice were pre-conditioned EAC with footshock, mice showed significantly increased freezing responses to the VS after the pairings. Application of CCK antagonist blocked the establishment of visuoauditory association in the behavioral experiment. CCK-/-mice have deficit in forming the visuoauditory association, but systemic administration of tetropeptide CCK rescued the formation of associative memory in CCK-/-mice. Our finding that an artificial memory formed under anesthesia could be translated into behavioral action provides a scientific foundation for "memory implantation" and CCK is the switching chemical for the formation of visuoauditory associative memory.

关键词： auditory cortex neural plasticity operant conditioning entorhinal cortex memory encoding cholecystokinin

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