Neural correlates of regional EEG power change
Neural correlates of regional EEG power change
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DOI：
10.1016/j.neuroimage.2007.04.030
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发表时间：
2007-07-15
期刊：
影响因子：
5.7
通讯作者：
Hallett, M.
中科院分区：
文献类型：
--
作者：
Oishi, N.;Mima, T.;Hallett, M.
为阐明任务相关性脑电节律变化的生理意义，定量评价了脑局部血流量（rCBF）与脑电功率的相关性。8名受试者进行（H2O）-O-15正电子发射断层扫描与EEG记录同时进行以下任务：休息条件下，闭眼和睁眼，自主节奏的运动，右，左拇指和右脚踝。从枕叶和双侧感觉运动区记录EEG信号。通过rCBF与脑电功率的相关性研究了与脑电节律产生相关的皮层激活。双侧10-20 Hz感觉运动脑电节律与同侧感觉运动rCBF、枕叶10-20 Hz感觉运动脑电节律与枕叶rCBF呈显著负相关。枕叶脑电节律与双侧内侧前额叶rCBF呈正相关，右侧感觉运动脑电节律与左侧前额叶rCBF呈正相关。总之，在10-20 Hz的区域EEG节律的减少可能代表了电极下的皮层的神经元激活，至少对于视觉和感觉运动区域。包括前额叶皮层在内的神经网络在脑电节律的产生中起着重要作用。(C)2007爱思唯尔公司All rights reserved.
To clarify the physiological significance of task-related change of the regional electroencephalogram (EEG) rhythm, we quantitatively evaluated the correlation between regional cerebral blood flow (rCBF) and EEG power. Eight subjects underwent (H2O)-O-15 positron emission tomography scans simultaneously with EEG recording during the following tasks: rest condition with eyes closed and open, self-paced movements of the right and left thumb and right ankle. EEG signals were recorded from the occipital and bilateral sensorimotor areas. Cortical activation associated with EEG rhythm generation was studied by the correlation between rCBF and EEG power. There were significant negative correlations between the sensorimotor EEG rhythm at 10-20 Hz on each side and the ipsilateral sensorimotor rCBF and between the occipital EEG rhythm at 10-20 Hz and the occipital rCBF. The occipital EEG rhythm showed a positive correlation with the bilateral medial prefrontal rCBF, while the right sensorimotor EEG rhythm showed a positive correlation with the left prefrontal rCBF. In conclusion, decrease in the regional EEG rhythm at 10-20 Hz might represent the neuronal activation of the cortex underlying the electrodes, at least for the visual and sensorimotor areas. The neural network including the prefrontal cortex could play an important role to generate the EEG rhythm. (C) 2007 Elsevier Inc. All rights reserved.