Spatially selective alpha oscillations reveal moment-by-moment trade-offs between working memory and attention

Dirk van Moorselaar*, Joshua J. Foster, David W. Sutterer, Jan Theeuwes, Christian N.L. Olivers, Edward Awh

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

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Abstract

Current theories assume a functional role for covert attention in the maintenance of spatial information in working memory. Consistent with this view, both the locus of attention and positions stored in working memory can be decoded based on the topography of oscillatory alpha-band (8-12 Hz) activity on the scalp. Thus far, however, alpha modulation has been studied in isolation for covert attention and working memory tasks. Here, we applied an inverted spatial encoding model in combination with EEG to study the temporal dynamics of spatially specific alpha activity during a task that required observers to visually select a target location while maintaining another independently varying location in working memory. During the memory delay period, alpha-based spatial tuning functions shifted from the position stored in working memory to the covertly attended position and back again after the attention task was completed. The findings provide further evidence for a common oscillatory mechanism in both the selection and the maintenance of relevant spatial visual information and demonstrate the dynamic trade-off in prioritization between two spatial tasks.

Original languageEnglish
Pages (from-to)256-266
Number of pages11
JournalJournal of Cognitive Neuroscience
Volume30
Issue number2
Early online date29 Dec 2017
DOIs
Publication statusPublished - Feb 2018

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