Spectral and Anatomical Patterns of Large-Scale Synchronization Predict Human Attentional Capacity

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http://hdl.handle.net/10138/330500

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Rouhinen , S , Siebenhühner , F , Palva , J M & Palva , S 2020 , ' Spectral and Anatomical Patterns of Large-Scale Synchronization Predict Human Attentional Capacity ' , Cerebral Cortex , vol. 30 , no. 10 , pp. 5293-5308 . https://doi.org/10.1093/cercor/bhaa110

Title: Spectral and Anatomical Patterns of Large-Scale Synchronization Predict Human Attentional Capacity
Author: Rouhinen, Santeri; Siebenhühner, Felix; Palva, J. Matias; Palva, Satu
Contributor: University of Helsinki, Neuroscience Center
University of Helsinki, Neuroscience Center
University of Helsinki, Matias Palva / Principal Investigator
University of Helsinki, Neuroscience Center
Date: 2020-09-03
Language: eng
Number of pages: 16
Belongs to series: Cerebral Cortex
ISSN: 1047-3211
URI: http://hdl.handle.net/10138/330500
Abstract: The capacity of visual attention determines how many visual objects may be perceived at any moment. This capacity can be investigated with multiple object tracking (MOT) tasks, which have shown that it varies greatly between individuals. The neuronal mechanisms underlying capacity limits have remained poorly understood. Phase synchronization of cortical oscillations coordinates neuronal communication within the fronto-parietal attention network and between the visual regions during endogenous visual attention. We tested a hypothesis that attentional capacity is predicted by the strength of pretarget synchronization within attention-related cortical regions. We recorded cortical activity with magneto- and electroencephalography (M/EEG) while measuring attentional capacity with MOT tasks and identified large-scale synchronized networks from source-reconstructed M/EEG data. Individual attentional capacity was correlated with load-dependent strengthening of theta (3-8 Hz), alpha (8-10 Hz), and gamma-band (30-120 Hz) synchronization that connected the visual cortex with posterior parietal and prefrontal cortices. Individual memory capacity was also preceded by crossfrequency phase-phase and phase-amplitude coupling of alpha oscillation phase with beta and gamma oscillations. Our results show that good attentional capacity is preceded by efficient dynamic functional coupling and decoupling within brain regions and across frequencies, which may enable efficient communication and routing of information between sensory and attentional systems.
Subject: 3112 Neurosciences
attention
capacity
EEG
MEG
oscillation
synchronization
VISUAL WORKING-MEMORY
SHORT-TERM-MEMORY
NEURONAL OSCILLATIONS
INDIVIDUAL-DIFFERENCES
PHASE-SYNCHRONIZATION
NEURAL MECHANISMS
BRAIN NETWORKS
TRACKING
ALPHA
PARIETAL
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