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Functional Mapping with Simultaneous MEG and EEG
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SimMEEG software for simulating event-related MEG and EEG data with underlying functional connectivity.

Anthony T Herdman1

  • 1School of Audiology & Speech Sciences, Faculty of Medicine, The University of British Columbia 2177 Wesbrook Mall, Vancouver, V6T 1Z3, Canada.

Journal of Neuroscience Methods
|December 14, 2020
PubMed
Summary
This summary is machine-generated.

SimMEEG software simulates electromagnetic brain signals to validate electrophysiological analysis methods like functional connectivity and phase-amplitude coupling (PAC). This tool aids in verifying analysis pipelines by comparing results to simulated ground truth.

Keywords:
ElectroencephalographyElectromagneticEvent-related responsesFunctional connectivityMagnetoencephalographyPhase coherenceSimulation

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Area of Science:

  • Neuroscience
  • Computational Biology
  • Signal Processing

Background:

  • Electromagnetic brain signal simulation is crucial for validating electrophysiological analysis.
  • Functional connectivity and phase-amplitude coupling (PAC) measurements require robust verification methods.

Purpose of the Study:

  • Develop SimMEEG, a Matlab software package for simulating interacting brain signals.
  • Enable verification of functional connectivity analyses (PLV, PLI) and PAC.

Main Methods:

  • SimMEEG allows users to define signal parameters like frequencies, amplitudes, and phase interactions.
  • The software simulates three interacting sources with user-defined event-related activity, synchronizations, and PAC.
  • A Monte-Carlo module simulates MEG and EEG datasets for inverse solution comparison.

Main Results:

  • SimMEEG accurately estimated signal input parameters for PLV, PLI, and PAC within target limits.
  • Simulated signals closely matched real human visual event-related responses.
  • SimMEEG identified effective and ineffective inverse solutions for functional connectivity analysis.

Conclusions:

  • SimMEEG provides a tool to simulate human EEG and MEG data for analysis pipeline verification.
  • The software facilitates comparison of analyzed results against user-defined simulated ground truth.
  • The core SimSignals program has potential applications in other fields requiring multi-signal simulations.