The topography of alpha-band activity tracks the content of spatial working memory


" Working memory (WM) is a system for the online storage of information. An emerging view is that neuronal oscillations coordinate the cellular assemblies that code the content of WM. In line with this view, previous work has demonstrated that oscillatory activity in the alpha band (8–12 Hz) plays a role in WM maintenance, but the exact contributions of this activity have remained unclear. Here … we found that the topographic distribution of alpha-band activity tracked the specific location that was held in WM. Evoked and total power across a range of low-frequency bands transiently tracked the location of the sample stimulus following stimulus onset. However, only total power in the alpha band tracked the content of spatial WM throughout the memory delay period ... These findings demonstrate that alpha-band activity is directly related to the coding of spatial representations held in WM."


Last modified on 15-Aug-16

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