Correlates of alpha rhythm in functional magnetic resonance imaging and near infrared spectroscopy
Correlates of alpha rhythm in functional magnetic resonance imaging and near infrared spectroscopy
复制标题
DOI：
10.1016/s1053-8119(03)00344-6
复制
发表时间：
2003-09-01
期刊：
影响因子：
5.7
通讯作者：
Villringer, A
中科院分区：
文献类型：
--
作者：
Moosmann, M;Ritter, P;Villringer, A
我们使用同步脑电图功能磁共振成像（EEG-fMRI）和脑电图近红外光谱（NIRS），以调查是否后方EEG α节律的变化与局部脑血氧的变化相关。在EEG和fMRI信号中缓慢波动的自发节律的互相关分析揭示了枕叶皮层中α活动和fMRI血氧水平依赖信号之间的反比关系。NIRS-EEG测量结果表明，枕叶皮层α活动与脱氧血红蛋白浓度变化之间存在正相关，其峰值相对偏移约为8 s。我们的数据表明，枕叶皮层的α活性与代谢失活有关。因此，自发同步分布式神经网络的映射是可行的。(C)2003年爱思唯尔公司All rights reserved.
We used simultaneous electroencephalogram-functional magnetic resonance imaging (EEG-fMRI) and EEG-near infrared spectroscopy (NIRS) to investigate whether changes of the posterior EEG alpha rhythm are correlated with changes in local cerebral blood oxygenation. Cross-correlation analysis of slowly fluctuating, spontaneous rhythms in the EEG and the fMRI signal revealed an inverse relationship between alpha activity and the fMRI-blood oxygen level dependent signal in the occipital cortex. The NIRS-EEG measurements demonstrated a positive cross-correlation in occipital cortex between alpha activity and concentration changes of deoxygenated hemoglobin, which peaked at a relative shift of about 8 s. Our data suggest that alpha activity in the occipital cortex is associated with metabolic deactivation. Mapping of spontaneously synchronizing distributed neuronal networks is thus shown to be feasible. (C) 2003 Elsevier Inc. All rights reserved.