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Related Experiment Video

Updated: Jul 14, 2026

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
08:45

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

Published on: October 24, 2012

Large-scale gamma-band phase synchronization and selective attention.

Sam M Doesburg1, Alexa B Roggeveen, Keiichi Kitajo

  • 1Psychophysics and Cognitive Neuroscience Laboratory, Department of Psychology, University of British Columbia, Vancouver V6T 1Z4, Canada. sam@psych.ubc.ca

Cerebral Cortex (New York, N.Y. : 1991)
|June 9, 2007
PubMed
Summary

Gamma-band synchronization, a brain mechanism, links neural activity for conscious perception. This study shows synchronized brain networks form when attention is directed, supporting cognitive processes.

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Computational Neuroscience

Background:

  • Understanding consciousness and intentionality requires explaining how distributed neuronal activity forms coherent percepts.
  • Gamma-band synchronization is hypothesized to integrate neural populations into dynamic, large-scale networks for specific tasks or perceptions.
  • Attention orienting is predicted to enhance gamma-band synchronization between cortical regions representing attended locations.

Purpose of the Study:

  • To investigate the role of gamma-band synchronization in attention orienting.
  • To determine if increased synchronization occurs in cortical areas representing attended locations during attention deployment.
  • To test the hypothesis of a large-scale gamma synchronous network oriented to a cued location.

Main Methods:

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Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
06:46

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

Published on: March 18, 2019

Related Experiment Videos

Last Updated: Jul 14, 2026

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
08:45

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

Published on: October 24, 2012

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
06:46

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

Published on: March 18, 2019

  • Electroencephalogram (EEG) recordings were obtained from subjects.
  • Subjects were instructed to attend to either the left or right visual field.
  • Phase-locking statistics were calculated between signals from relevant electrode pairs to measure gamma-band synchronization.

Main Results:

  • Increased gamma-band phase synchronization was observed between the visual cortex contralateral to the attended location and other widespread cortical areas.
  • This increased synchronization occurred approximately 240-380 ms after the directional cue presentation.
  • Event-related potential analysis confirmed the subjects' attentional focus.

Conclusions:

  • The findings support the hypothesis that gamma-band synchronization forms large-scale networks for attention orienting.
  • A transient, large-scale gamma synchronous network is oriented to the cued location during attention deployment.
  • This mechanism contributes to the neural basis of higher cognitive functions like attention and perception.