Pfurtscheller G, Pregenzer M, Neuper C
Department of Medical Informatics, Graz University of Technology, Austria.
Neurosci Lett. 1994 Nov 7;181(1-2):43-6. doi: 10.1016/0304-3940(94)90556-8.
It is well known that mu and central beta rhythms start to desynchronize > 1 s before active hand or finger movement. To investigate whether the same cortical areas are involved in desynchronization of mu and central beta rhythms, 56-channel EEG recordings were made during right- and left-finger flexions in three normal subjects. The event-related desynchronization (ERD) was quantified in single EEG trials and classified by the Distinction Sensitive Learning Vector Quantization (DSLVQ) algorithm. This DSLVQ selects the most relevant features (electrode positions) for discrimination between the preparatory state for left- and right-finger movements. It was found that the most important electrode positions were close to the primary hand area. However, in all three subjects the focus of the central beta ERD was slightly anterior to the focus of mu desynchronization. This can be interpreted that different neural networks are involved in the generation of mu and central beta rhythms.
众所周知，在主动手部或手指运动前1秒以上，缪波和中央β节律开始去同步化。为了研究缪波和中央β节律去同步化是否涉及相同的皮质区域，对三名正常受试者在右手和左手手指屈曲过程中进行了56通道脑电图记录。在单通道脑电图试验中对事件相关去同步化（ERD）进行量化，并通过区分敏感学习向量量化（DSLVQ）算法进行分类。这种DSLVQ选择最相关的特征（电极位置）来区分左、右手手指运动的准备状态。发现最重要的电极位置靠近主要手部区域。然而，在所有三名受试者中，中央β ERD的焦点略位于缪波去同步化焦点的前方。这可以解释为不同的神经网络参与了缪波和中央β节律的产生。
