Schweitzer G, Edlinger G, Krausz G, Neuper C, Bammer R, Stollberger R, Pfurtscheller G
Institut für Elektro- und Biomedizinische Technik, Abteilung für Medizinische Informatik, TU Graz, Austria.
Biomed Tech (Berl). 2001 Jan-Feb;46(1-2):24-8. doi: 10.1515/bmte.2001.46.1-2.24.
We investigated the EEG beta event-related synchronization (ERS) after tactile finger stimulation in three subjects. Prior studies from our group using electrical stimulation and self-paced movement showed a beta rebound within one second after stimulation respectively movement offset. As the tactile-stimulation-data showed a similar ERS behaviour, we extracted the cortical sources for this beta rebound by the linear estimation method in order to see whether the representation areas of different fingers were distinguishable (as is possible with MEG data). Although realistic head models of two subjects were used for the calculations the fingers could not be spatially distinguished. However, regarding the whole spatio-temporal pattern of the ERS for different fingers clear differences can be observed.
我们研究了三名受试者在手指触觉刺激后的脑电图β事件相关同步化（ERS）。我们小组之前使用电刺激和自主运动的研究分别显示，在刺激或运动停止后一秒内出现β波反弹。由于触觉刺激数据显示出类似的ERS行为，我们通过线性估计方法提取了这种β波反弹的皮质源，以查看不同手指的表征区域是否可区分（这在脑磁图数据中是可能的）。尽管在计算中使用了两名受试者的真实头部模型，但手指在空间上无法区分。然而，关于不同手指ERS的整个时空模式，可以观察到明显的差异。
