Schack B, Grieszbach G, Krause W
Institute of Medical Statistics, Computer Science and Documentation, University of Jena, Germany.
Int J Psychophysiol. 1999 Mar;31(3):219-40. doi: 10.1016/s0167-8760(98)00052-x.
In this study the sensitivity of instantaneous EEG coherence for the description of the processual evolution of thinking processes is investigated. The adaptive estimation approach presented allows the calculation of the coherence function with high time and frequency resolution. On this basis the detection of time intervals with high synchronization phenomena is possible. The strength of coupling between different EEG channels may therefore be measured even for very short mental activities. The inclusion of the time component enables the calculation of very sensitive coherence parameters, such as the maximal coherence value or the length of time intervals with high synchronization during information processing. Based on these dynamic examinations, conceptual and imaginal representations are distinguishable for elementary cognitive processes.
在本研究中，我们研究了瞬时脑电图相干性对思维过程演化过程描述的敏感性。所提出的自适应估计方法允许以高时间和频率分辨率计算相干函数。在此基础上，可以检测出具有高同步现象的时间间隔。因此，即使对于非常短暂的心理活动，也可以测量不同脑电图通道之间的耦合强度。时间成分的纳入使得能够计算非常敏感的相干参数，例如信息处理过程中最大相干值或高同步时间间隔的长度。基于这些动态检查，对于基本认知过程，概念性和想象性表征是可区分的。
