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A computer simulation study of cortical imaging from scalp potentials

Y Wang1, B He

  • 1University of Illinois at Chicago, Department of Electrical Engineering and Computer Science, IL 60607, USA.

IEEE Transactions on Bio-Medical Engineering
|June 4, 1998
PubMed
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Computer simulations demonstrate a new method for imaging brain electrical activity using scalp electroencephalograms (EEG). This technique successfully images cortical and deep brain sources with high spatial resolution for cortical activity.

Area of Science:

  • Neuroscience
  • Biophysics
  • Medical Imaging

Background:

  • Scalp electroencephalograms (EEG) offer a non-invasive window into brain electrical activity.
  • Accurate localization of neuronal sources from EEG data remains a challenge.

Purpose of the Study:

  • To test the feasibility of imaging brain electrical activity using scalp EEG data.
  • To evaluate the spatial resolution achievable with the proposed imaging method.

Main Methods:

  • Computer simulations were performed using an inhomogeneous three-concentric-sphere head model.
  • Cortical potential maps were reconstructed using closed spherical dipole layers representing neuronal sources.

Main Results:

  • The simulation procedure successfully imaged both cortical and deep brain sources.

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  • A spatial resolution of 1.2 cm was achieved for imaging cortical sources.

    • Conclusions:

    • The developed procedure is feasible for imaging brain electrical activity from scalp EEG.
    • The method shows promise for non-invasive localization of neuronal activity with good spatial resolution.