Global synchronization in the theta band during mental imagery of navigation in humans
Global synchronization in the theta band during mental imagery of navigation in humans
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DOI：
10.1016/j.neures.2009.05.004
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发表时间：
2009-09-01
影响因子：
2.9
通讯作者：
Nishijo, Hisao
中科院分区：
文献类型：
--
作者：
Li, Yang;Umeno, Katsumi;Nishijo, Hisao
视觉心理意象对于成功地驾驭环境至关重要，这反过来又会同时激活许多皮层区域。Theta振荡与导航和大脑同步有关。在这项研究中，在3个任务中分析了EEG相干性：受试者（I）在脑海中模拟沿着体育馆的墙壁慢跑，当他们想象到达一个角落时按下一个按钮（慢跑想象任务），（2）按下按钮5次后，想到并记住一个数字，再次按下按钮后，依次回忆数字。（3）按下按钮（按下按钮任务）。结果表明，在数字和慢跑想象任务中，额叶和顶叶的θ波（4-8 Hz）功率显着较高。在theta波段的连贯性显示按钮按压和数字图像任务之间几乎没有差异。在慢跑想象任务中，远距离区域之间，特别是额叶和顶枕区之间以及纵裂区域之间的一致性显著增加。θ振荡似乎在大规模同步中发挥重要作用，以形成心理导航所需的功能性神经元网络。(C)2009年爱思唯尔爱尔兰有限公司和日本神经科学学会。All rights reserved.
Visual mental imagery is critical for successfully navigating the environment, which in turn activates many cortical regions simultaneously. Theta oscillation is implicated in navigation and brain synchronization.In this study, EEG coherence was analyzed during 3 tasks: subjects (I) mentally simulated jogging along the walls of a gym and pressed a button when they imagined arriving at a corner (jogging imagery task), (2) thought of and memorized one digit after pressing a button 5 times and recalled the digits sequentially after pressing the button again (digit imagery task), and (3) pressed a button (button pressing task). The results indicated that theta-wave (4-8 Hz) power was significantly higher in the frontal and parietal regions during the digit and jogging imagery tasks. Coherence at the theta band showed almost no differences between the button pressing and digit imagery tasks. Coherence between the distant regions, especially between the frontal and parieto-occipital regions and between interhemispheric regions, was significantly higher during the jogging imagery task.Increase in theta power during the jogging imagery task reflects working memory load to manipulate internal information. Theta oscillation appears to play an important role in large-scale synchronization to form the functional neuronal networks required for mental navigation. (C) 2009 Elsevier Ireland Ltd and the Japan Neuroscience Society. All rights reserved.