Propagation of EEG activity during finger movement and its imagination
Propagation of EEG activity during finger movement and its imagination
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DOI：
10.55782/ane-2006-1607
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发表时间：
2006-01-01
影响因子：
1.4
通讯作者：
Blinowska, Katarzyna J.
中科院分区：
文献类型：
--
作者：
Kus, Rafal;Ginter, Jozef S.;Blinowska, Katarzyna J.
我们研究了手指运动实验和该任务的想象过程中β和γ波段的脑电活动传播模式。通过基于多变量自回归模型的短时定向传递函数（SDTF）对数据进行分析。来自右（或左）半球的信号被同时处理（而不是成对处理），这对于获得正确的EEG活动传输图像至关重要。在β波段的传播模式涉及两个任务的运动执行过程中，从运动区的传播减少-在想象的情况下不太明显。运动的表现主要与手感觉运动区的伽马活动的短暂爆发有关。在想象的情况下，伽马流出持续时间更长，涉及更大的大脑区域。
We investigated the pattern of EEG activity propagation in the beta and gamma band during a finger movement experiment and imagination of that task. The data were analyzed by means of a short-time directed transfer function (SDTF) based on a multivariate autoregressive model. The signals from the right (or left) hemisphere were processed simultaneously (not pairwise), which is crucial for obtaining a correct picture of EEG activity transmissions. The pattern of propagation in the beta band involved for both tasks a decrease of the propagation from the motor areas during the execution of the movement - less pronounced in the case of imagination. The performance of the motion was mainly connected with a short outburst of gamma activity from the hand sensorimotor areas. In case of imagination the gamma outflow lasted longer and concerned larger brain areas.