Kaplan A Ia, Shishkin S L, Ivashko R M
Lomonosov State University, Moscow.
Zh Vyssh Nerv Deiat Im I P Pavlova. 2000 Jul-Aug;50(4):624-37.
Topographic features of spatial synchronization of sharp changes, or rapid transition processes (RTP), were studied in human EEG recorded from longitudinal and transversal electrode arrays. A new algorithm, the EEG Threshold Scanning, was proposed for the detection of the RTP. Synchronization of the RTP was estimated by Operational Synchrony Index (OSI) based on the difference between the actual and stochastic frequency of RTP coincidence in a pair of EEG channels. The relationship between the OSI and interelectrode distance was not monotonous. The OSI depended also on the extent of morpho-functional similarity between two cortical areas. Similar results were obtained for crosscorrelation calculated for the same pairs of the EEG derivations. The existence of dynamic spatial modules which incorporate different brain areas by complementary stabilization of their functional states is discussed.
在从纵向和横向电极阵列记录的人类脑电图中，研究了尖锐变化或快速转变过程（RTP）的空间同步的地形特征。提出了一种新的算法——脑电图阈值扫描，用于检测RTP。基于一对脑电图通道中RTP重合的实际频率与随机频率之间的差异，通过操作同步指数（OSI）估计RTP的同步性。OSI与电极间距离的关系并非单调。OSI还取决于两个皮质区域之间形态功能相似性的程度。对于相同脑电图导联对计算的互相关，也获得了类似的结果。讨论了通过功能状态的互补稳定将不同脑区纳入其中的动态空间模块的存在。
