Journal
NEUROIMAGE
Volume 89, Issue -, Pages 235-243Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.neuroimage.2013.12.018
Keywords
Alpha lateralization; Alpha modulation; Adaptation; Statistics; Oscillations; Covert attention; Attention switching; Magnetoencephalography; Individual differences
Funding
- Fyssen Foundation
- Human Frontiers Science Program grant [RGP0036/2009-c]
- Innovational Research Incentives Scheme of the Netherlands Organisation for Scientific Research (NWO) [016-095-340]
- James McDonnell scholar award
- research program The healthy brain
- Netherlands Initiative Brain and Cognition (NIHC)
- Organization for Scientific Research (NWO) [056-14-011]
- VICI [453-09-002]
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Recent findings suggest that oscillatory alpha activity (7-13 Hz) is associated with functional inhibition of sensory regions by filtering incoming information. Accordingly the alpha power in visual regions varies in anticipation of upcoming, predictable stimuli which has consequences for visual processing and subsequent behavior. In covert spatial attention studies it has been demonstrated that performance correlates with the adaptation of alpha power in response to explicit spatial cueing. However it remains unknown whether such an adaptation also occurs in response to implicit statistical properties of a task. In a covert attention switching paradigm, we here show evidence that individuals differ on how they adapt to implicit statistical properties of the task. Subjects whose behavioral performance reflects the implicit change in switch trial likelihood show strong adjustment of anticipatory alpha power lateralization. Most importantly, the stronger the behavioral adjustment to the switch trial likelihood was, the stronger the adjustment of anticipatory posterior alpha lateralization. We conclude that anticipatory spatial attention is reflected in the distribution of posterior alpha band power which is predictive of individual detection performance in response to the implicit statistical properties of the task. (C) 2013 Elsevier Inc. All rights reserved.
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