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Related Experiment Video

Updated: Mar 24, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

Top-down alpha oscillatory network interactions during visuospatial attention orienting.

Sam M Doesburg¹, Nicolas Bedo², Lawrence M Ward³

¹Department of Biomedical Physiology and Kinesiology, Simon Fraser University, Canada; Behavioural and Cognitive Neurosciences Institute, Simon Fraser University, Canada.

|March 9, 2016

Summary

This summary is machine-generated.

This study reveals how brain networks control visual attention. Alpha-band oscillations coordinate information flow from attention control areas to visual cortex, inhibiting ignored visual space.

Keywords:

Alpha oscillation Covert visual attention orienting Magnetoencephalography Selective attention Transfer entropy

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Published on: October 24, 2012

Related Experiment Videos

Last Updated: Mar 24, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

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Published on: March 18, 2019

Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control

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Published on: July 5, 2015

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example

Published on: October 24, 2012

Area of Science:

Cognitive Neuroscience
Neuroimaging
Computational Neuroscience

Background:

Visual attention relies on distributed brain networks and alpha-band oscillations in early visual cortex.
The interplay between attention control networks and oscillatory mechanisms remains poorly understood.
Previous research links alpha oscillations to inhibiting ignored visual areas.

Purpose of the Study:

To investigate if alpha-band directed network interactions within the attention control network are modulated by the locus of visuospatial attention.
To clarify the relationship between distributed attention networks and focal oscillatory mechanisms.

Main Methods:

Magnetoencephalography (MEG) was used to localize brain areas involved in visuospatial attention orienting.
Narrow-band transfer entropy analyzed alpha-band Granger-causal interactions among activated regions.
Lateralization of alpha power changes post-cue onset indexed attention deployment.

Main Results:

Attention deployment to one visual field correlated with lateralized alpha power changes (400-700ms post-cue).
These alpha power changes coincided with lateralized anterior-to-posterior alpha-band information flow.
Information flow originated from attention control areas (ACC, frontal, temporal, insula, parietal) to early visual areas.

Conclusions:

Distributed network interactions mediated by alpha oscillations exert top-down control on early visual cortex.
This mechanism modulates the inhibition of processing for ignored visual space.
Findings elucidate the neural dynamics underlying visuospatial attention control.