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Updated: Sep 12, 2026
Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
Published on: October 24, 2012
Protocol for mapping frequency-specific information transfer between cortical areas using ECoG and Granger causality
Xiangsheng Zeng1, Tao Zhou2, Chengpeng Li1
1School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou 310058, China; Key Laboratory for Biomedical Engineering of Ministry of Education, College of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou 310027, China.
Abstract:
This protocol details the application of Granger causality (GC) analysis to primate electrocorticography (ECoG) data to map frequency-specific information transfer. We describe steps for computing pairwise GC and generating spatial GC maps, including differential maps to isolate task-specific activity. We then explain how to perform hierarchical clustering on GC patterns to identify and visualize the spatial distribution of functional electrode clusters, revealing the organization of information flow. For complete details on the use and execution of this protocol, please refer to Zhou et al.1.
