基于脑电信号分析的正确记忆与错误记忆的差异性
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R318

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国家自然科学基金项目(面上项目,重点项目,重大项目)


The Difference between Correct Memory and False Memory Based on EEG Analysis
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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    旨在探索工作记忆中正确记忆与错误记忆的差异性,更好的区分正确记忆与错误记忆。本文设计了基于DRM范式的改进的脑电实验,采集被试的脑电数据,探究正确记忆与错误记忆的差异性。采用时频域分析的方法分别对δ、θ、α、β、γ波进行了差异分析,对具有显著差异的频段采用皮尔逊相关方法分别构建脑功能网络,并对脑网络特征属性进行了对比分析。结果显示,大脑前顶区错误记忆θ、α2波能量谱密度显著大于正确记忆(P<0.05)。对脑网络的分析结果显示,大脑前后额区、后顶区θ、α2波脑功能网络连接正确记忆显著多于错误记忆;正确记忆θ、α2波节点度均显著高于错误记忆,α2波聚类系数正确记忆显著高于错误记忆;正确记忆与错误记忆θ、α2波介数中心度均无显著差别。结果表明,正确记忆任务θ、α2波大脑功能连接通路较错误记忆任务更多。正确记忆平均反应时长是961.56ms;错误记忆平均反应时长是1097.99ms。结果表明,与正确记忆相比,错误记忆反应时长明显长于正确记忆。研究结果表明,大脑前顶区正确记忆与错误记忆脑波活动能量差异表现最明显,差异波中错误记忆大脑活跃度均显著高于正确记忆;大脑后额区θ、α2波脑网络连接程度及节点度差异最明显,正确记忆均显著大于错误记忆,可能同存在后额-前顶记忆机制,使得正确记忆与错误记忆存在明显差异。

    Abstract:

    The aim is to explore the difference between correct memory and false memory in working memory so as to better distinguish correct memory from false memory. In this paper, an improved EEG experiment based on DRM paradigm is designed.The difference between correct memory and false memory is explored by collecting the EEG data of the experimenter. The differences of δ, θ, α, β and γ waves were analyzed by time-frequency domain analysis method. And the brain functional networks were constructed by Pearson correlation method for the frequency bands with significant differences. And the characteristic attributes of brain networks were compared and analyzed. The results show that the energy spectral density of θ and α2 waves in the anterior parietal region of the brain is significantly higher than that in the correct memory(P<0.05). The results of brain network analysis show that the correct memory is significantly more than the false memory in the connection of brain functional network of θ and α2 waves in the anterior and posterior frontal regions, posterior parietal regions. The node degrees of both θ and α2 waves in correct memory are significantly higher than those in false memory, and the cluster coefficients of α2 waves in correct memory are significantly higher than those in false memory. There was no significant difference in the centrality of θ and α2 wave mediators between correct and false memory. The results show that the brain functional connectivity pathways of θ anwaves in the correct memory task are more than those in the false memory task. The average response time of correct memory is 961.56ms. The average response time of false memory is 1097.99ms. The results show that the response time of false memory is significantly longer than that of correct memory. The results show that the difference of brain wave activity between correct and false memory is the most obvious in the anterior parietal region, and the brain activity of false memory is significantly higher than that of correct memory in the difference wave. The connection degree and node degree of θ and α2 waves in the posterior frontal region of the brain are significantly different, and the correct memory is significantly greater than the false memory, which may also exist the mechanism of posterior frontal - anterior parietal memory, which makes the difference between the correct memory and the false memory.

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引用本文

张峻瑜,李颖,张志谋,等. 基于脑电信号分析的正确记忆与错误记忆的差异性[J]. 科学技术与工程, 2022, 22(16): 6430-6441.
Zhang Junyu, Li Ying, Zhang Zhimou, et al. The Difference between Correct Memory and False Memory Based on EEG Analysis[J]. Science Technology and Engineering,2022,22(16):6430-6441.

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  • 收稿日期:2021-07-30
  • 最后修改日期:2022-02-23
  • 录用日期:2021-12-25
  • 在线发布日期: 2022-06-22
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