Discussion of nonlinear local optimization methods for EEG inverse problem solution

Ling Zou, Shan An Zhu, Ying Chun Zhang, Nuo Gao

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

The EEG inverse problem solution is an important issue in EEG research. Nonlinear local optimization methods, such as Simplex and Levenberg-Marquart algorithms, were used to solve EEG dipole source localization problems. The relationship between localizing errors and noise level was discussed on the condition that the source number was known. If the source number was unknown, the selected number in model might not equal to the actual one, then a computation was carried out and a corresponding discrimination criteria was proposed. Approximation accuracy between the simulation measurements and dipole-generated potentials was given. The computation speed and the localizing results between the two algorithms were compared. Computer simulation demonstrates that nonlinear local optimization methods are effective for EEG inverse solution if the source number is one or two and the initial iterative values are reasonable.

Original languageEnglish (US)
Pages (from-to)108-113
Number of pages6
JournalZhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science)
Volume38
Issue number1
StatePublished - Jan 2004

Keywords

  • EEG inverse problem
  • Equivalent current dipole
  • Levenberg-Marquart algorithm
  • Simplex algorithm

ASJC Scopus subject areas

  • Instrumentation

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