Related Experiment Video
Updated: Jun 23, 2026
06:04
Functional Mapping with Simultaneous MEG and EEG
Published on: June 14, 2010
High-gamma frequency-tagged magnetoencephalography reveals time-resolved task-related functional coupling during
Kenji Yoshiki1, Masashi Kinoshita2, Ruochu Xiong1
1Department of Neurosurgery, Division of Medicine, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa, Japan.
Scientific Reports
|June 21, 2026
Summary
Fast periodic visual stimulation (FPVS) with magnetoencephalography (MEG) mapped brain activity during a visuospatial task. This method precisely identified cortical activation and functional connectivity in visual processing.
Area of Science:
- Neuroscience
- Cognitive Science
- Biophysics
Background:
- Fast periodic visual stimulation (FPVS) combined with magnetoencephalography (MEG) is effective for analyzing brain responses.
- Its use in cognitive paradigms, especially visuospatial attention, is not well-established.
Purpose of the Study:
- To develop an FPVS-based line bisection task to investigate visuospatial cognition.
- To map cortical activation and functional connectivity during visual exploration using eye movements.
Main Methods:
- Developed an FPVS paradigm using line stimuli modulated at 80 Hz.
- Utilized magnetoencephalography (MEG) and eye-tracking in healthy volunteers.
- Performed source analysis and frequency-domain analysis (Morlet wavelet).
Main Results:
- Identified sequential cortical activation starting in occipital regions (~100 ms) and spreading to temporoparietal, frontal, and parietal areas (~130-220 ms).
- Confirmed significantly higher 80 Hz power during stimulation compared to baseline.
- Revealed task-related functional connectivity between parietal regions and other cortical areas.
Conclusions:
- FPVS-MEG successfully enabled precise temporal mapping of visuospatial processing.
- Demonstrated the utility of FPVS-MEG in studying cognitive functions and their underlying neural networks.
