The Realistic Versus the Spherical Head Model in EEG Dipole Source Analysis in the Presence of Noise

Abstract

The performance of the three-shell spherical head model versus the performance of the realistic head model is investigated when solving the inverse problem with a single dipole, in the presence of noise. This is evaluated by inspecting the average dipole location error when applying a spherical and a realistic head models, for 1000 noisy scalp potentials, originating from the same test dipole and having the same noise level. The location errors are obtained utilizing a local linearization, which is validated with a Monte Carlo simulation. For 27 electrodes, an EEG epoch of one time sample and spatially white Gaussian noise we found that the importance of the realistic head model over the spherical head model reduces by increasing the noise level.

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Document Details

Document Type
Technical Report
Publication Date
Oct 25, 2001
Accession Number
ADA410071

Entities

People

  • Bart Vanrumste
  • Gert Van Hoey
  • Michel D'have
  • Peter Van Hese
  • Rik Van De Walle

Tags

DTIC Thesaurus Topics

  • Data Science
  • Electrodes
  • Engineering
  • Gaussian Noise
  • Information Science
  • Inverse Problems
  • Mathematical Analysis
  • Mathematics
  • Monte Carlo Method
  • Noise
  • Simulations

Readers

  • Brain and Cognitive Science; Experimental Psychology; Cognitive Neuroscience
  • Computational Modeling and Simulation
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering