Müller-Putz Gernot R, Zimmermann Doris, Graimann Bernhard, Nestinger Kurt, Korisek Gerd, Pfurtscheller Gert
Laboratory of Brain-Computer Interfaces, Institute for Knowledge Discovery, Graz University of Technology, Krenngasse 37, 8010 Graz, Austria.
Brain Res. 2007 Mar 16;1137(1):84-91. doi: 10.1016/j.brainres.2006.12.052. Epub 2006 Dec 22.
A number of electroencephalographic (EEG) studies report on motor event-related desynchronization and synchronization (ERD/ERS) in the beta band, i.e. a decrease and increase of spectral amplitudes of central beta rhythms in the range from 13 to 35 Hz. Following an ERD that occurs shortly before and during the movement, bursts of beta oscillations (beta ERS) appear within a 1-s interval after movement offset. Such a post-movement beta ERS has been reported after voluntary hand movements, passive movements, movement imagination, and also after movements induced by functional electrical stimulation. The present study compares ERD/ERS patterns in paraplegic patients (suffering from a complete spinal cord injury) and healthy subjects during attempted (active) and passive foot movements. The aim of this work is to address the question, whether patients do have the same focal beta ERD/ERS pattern during attempted foot movement as healthy subjects do. The results showed midcentral-focused beta ERD/ERS patterns during passive, active, and imagined foot movements in healthy subjects. This is in contrast to a diffuse and broad distributed ERD/ERS pattern during attempted foot movements in patients. Only one patient showed a similar ERD/ERS pattern. Furthermore, no significant ERD/ERS patterns during passive foot movement in the group of the paraplegics could be found.
一些脑电图（EEG）研究报告了β波段中的运动事件相关去同步化和同步化（ERD/ERS），即13至35赫兹范围内中央β节律的频谱幅度的降低和增加。在运动前和运动期间不久出现的ERD之后，β振荡爆发（βERS）在运动结束后的1秒间隔内出现。在自主手部运动、被动运动、运动想象以及功能性电刺激诱发的运动之后，都报道过这种运动后的βERS。本研究比较了截瘫患者（患有完全性脊髓损伤）和健康受试者在尝试（主动）和被动足部运动期间的ERD/ERS模式。这项工作的目的是解决一个问题，即患者在尝试足部运动时是否具有与健康受试者相同的局灶性βERD/ERS模式。结果显示，健康受试者在被动、主动和想象足部运动期间出现了以中央中部为焦点的βERD/ERS模式。这与患者在尝试足部运动期间的弥漫性和广泛分布的ERD/ERS模式形成对比。只有一名患者表现出类似的ERD/ERS模式。此外，在截瘫患者组中，未发现被动足部运动期间有明显的ERD/ERS模式。
