Pfurtscheller G, Aranibar A
EEG EMG Z Elektroenzephalogr Elektromyogr Verwandte Geb. 1978 Mar;9(1):18-23.
Movement-related desynchronization was investigated in the EEG from central region in human subjects, during voluntary self-paced movement of the thumb. The average dynamic time-behaviour of the power in the alpha band was calculated from 4 sec before to 2 sec after voluntary movement. In all investigated subjects (9 students and 7 patients with several forms of hemiplegia) a significant power reduction before voluntary movement of the thumb was found. This power decrease can be interpreted as desynchronization of the central mu activity. Therefore, it appears that in all subjects a mu activity can be demonstrated. In most cases, a short-lasting desynchronization of central mu activity occurred about 2 sec before movement onset and was followed by a second one, about 1 sec before movement onset which reached a maximum during initiation of movement. Frequently the first desynchronization occurred in parallel but often also before the Bereitschaftspotential.
在人类受试者进行拇指自主自定步速运动期间，对其大脑中央区域脑电图中的运动相关去同步化进行了研究。从自主运动前4秒到运动后2秒计算α波段功率的平均动态时间行为。在所有被研究的受试者（9名学生和7名患有几种偏瘫形式的患者）中，发现拇指自主运动前有显著的功率降低。这种功率下降可解释为中央μ活动的去同步化。因此，似乎在所有受试者中都能证明存在μ活动。在大多数情况下，中央μ活动在运动开始前约2秒出现短暂去同步化，随后在运动开始前约1秒出现第二次去同步化，在运动启动期间达到最大值。第一次去同步化经常与准备电位同时出现，但也常常在准备电位之前出现。
