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  • Title: [Research on the influence of mixed emotional factors on false memory based on brain functional network].
    Author: Ni Z, Li Y, Zhao Y, Yang S, Yin N.
    Journal: Sheng Wu Yi Xue Gong Cheng Xue Za Zhi; 2021 Oct 25; 38(5):828-837. PubMed ID: 34713650.
    Abstract:
    Analyzing the influence of mixed emotional factors on false memory through brain function network is helpful to further explore the nature of brain memory. In this study, Deese-Roediger-Mc-Dermott (DRM) paradigm electroencephalogram (EEG) experiment was designed with mixed emotional memory materials, and different kinds of music were used to induce positive, calm and negative emotions of three groups of subjects. For the obtained false memory EEG signals, standardized low resolution brain electromagnetic tomography algorithm (sLORETA) was applied in the source localization, and then the functional network of cerebral cortex was built and analyzed. The results show that the positive group has the most false memories [(83.3 ± 6.8)%], the prefrontal lobe and left temporal lobe are activated, and the degree of activation and the density of brain network are significantly larger than those of the calm group and the negative group. In the calm group, the posterior prefrontal lobe and temporal lobe are activated, and the collectivization degree and the information transmission rate of brain network are larger than those of the positive and negative groups. The negative group has the least false memories [(73.3 ± 2.2)%], and the prefrontal lobe and right temporal lobe are activated. The brain network is the sparsest in the negative group, the degree of centralization is significantly larger than that of the calm group, but the collectivization degree and the information transmission rate of brain network are smaller than the positive group. The results show that the brain is stimulated by positive emotions, so more brain resources are used to memorize and associate words, which increases false memory. The activity of the brain is inhibited by negative emotions, which hinders the brain's memory and association of words and reduces false memory. 通过脑功能网络分析混合情绪因素对错误记忆的影响，有助于更深入地探索大脑记忆的本质。本研究采用混合情绪性记忆材料设计了迪斯-罗迪格-麦克德莫特（DRM）范式脑电试验，使用不同音乐对三组受试者分别诱发积极、平静和消极情绪，利用标准化低分辨率脑电磁层析成像算法（sLORETA）对采集到的错误记忆脑电信号进行溯源，进而构建皮层脑功能网络并进行分析。结果显示，积极组的错误记忆最多［（83.3 ± 6.8）%］，主要激活了大脑前额叶及左颞叶，且激活程度和脑网络连接密度显著大于平静组和消极组；平静组主要激活了大脑的额叶后部及颞叶，脑网络的集团化程度和传递信息的速率大于积极组和消极组；消极组的错误记忆最少［（73.3 ± 2.2）%］，主要激活了大脑的前额叶及右颞叶，脑网络连接最稀疏，节点中央化程度显著大于平静组，但脑网络的集团化程度和传递信息的速率小于积极组。结果表明，积极情绪激发大脑调用更多的脑力资源对语义进行编码和联想，增加了错误记忆；消极情绪抑制大脑的活动，阻碍大脑对语义的编码和联想，从而减少了错误记忆。.
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