Pfurtscheller G, Neuper C, Mohl W
Ludwig Boltzmann Institute of Medical Informatics and Neuroinformatics, Graz, Austria.
Int J Psychophysiol. 1994 May;16(2-3):147-53. doi: 10.1016/0167-8760(89)90041-x.
Event-related desynchronization (ERD) is the short-lasting attenuation or blocking of rhythms within the alpha (beta) band. ERD is found during but also before visual stimulation. Two different types of ERD can be differentiated: one short-lasting, localized to occipital areas and involving upper alpha components; the other longer lasting, more widespread, most prominent over parietal areas and maximal for lower alpha components. The former most likely reflects primary visual processing and feature extraction, the latter is more related to cognitive processing and mechanisms of attention.
事件相关去同步化（ERD）是指α（β）频段内节律的短暂衰减或阻断。ERD不仅在视觉刺激期间出现，在视觉刺激之前也会出现。可以区分出两种不同类型的ERD：一种持续时间短，局限于枕叶区域，涉及α频段的较高成分；另一种持续时间较长，分布更广泛，在顶叶区域最为突出，对α频段的较低成分影响最大。前者很可能反映了初级视觉处理和特征提取，后者则更多地与认知处理和注意力机制相关。
