工作记忆中后颞叶与其他脑区的同步效应

发布时间：2018-02-02 10:55

本文关键词： 工作记忆后颞叶皮层相干同步功能网络　出处：《中国生物医学工程学报》2015年02期 　论文类型：期刊论文

【摘要】：采用脑电图(EEG)相干分析法构建功能网络,目的在于研究人脑负责工作记忆(WM)的主要区域——大脑后颞叶在不同模式工作记忆过程中的作用地位和区域职能。为此设计两种实验范式,要求12名受试记忆分别表征WM的两个成分,即语音回路和视空间模板的可言辞表达的字母串和非言辞表达的图形。采集19导EEG,分别计算语音回路和视空间模板的相干系数矩阵,绘制功能网络。结果显示,与静息态相比,在语音回路和视空间模板中,后颞叶(T5、T6)与其他脑区的θ(4~7 Hz)相干明显增强(P0.05),表明后颞叶与其他脑区的θ频段同步效应参与WM;此外,在语音回路、视空间模板的功能网络中,节点T5、T6的度差异显著,但都远高于其他节点,表明左、右后颞叶分别在语音回路、视空间模板WM中扮演着专家化区域的角色。
[Abstract]:The functional network was constructed by EEG coherence analysis. The purpose of this study was to study the role and regional function of the posterior temporal lobe in the process of working memory in different modes, which is the main region of the brain responsible for working memory (WM). Two experimental paradigms were designed for this purpose. Twelve subjects were asked to represent the two components of WM, the phonetic loop and the visual space template, respectively. 19 lead EEG were collected. The coherence coefficient matrix of the speech loop and the visual space template are calculated, and the functional network is drawn. The results show that, compared with the rest state, in the speech loop and the visual space template, the posterior temporal lobe is T5. The correlation between T6 and other brain regions was significantly enhanced (P 0.05), indicating that the synchronization effect of 胃 band between the posterior temporal lobe and other brain regions was involved in WM. In addition, in the speech loop, visual space template functional network, the degree of node T5 T6 is significantly different, but far higher than the other nodes, indicating that the left and right posterior temporal lobe are in the speech loop. Visual space template WM plays an expert role.
【作者单位】：华侨大学信息科学与工程学院;
【基金】：国家自然科学基金(61203369) 中央高校基本科研业务费专项基金(12Y0308)
【分类号】：R338
【正文快照】： 引言工作记忆(working memory,WM)的概念是1974年由Baddeley和Hitch在短时记忆基础上提出的。他们在报道中提出,工作记忆是对信息进行暂时加工和保存的容量有限的记忆系统,在表象、言语、学习、推理和解决问题的高级认知活动中起着非常重要的作用[1]。工作记忆可以分为中央执

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