EEG source estimation based on dipole distribution model

R. Mizuno, T. Shiina, Y. Saito

研究成果: Conference article査読

抄録

To visualize electric brain activities from EEG data, we proposed a method for estimating EEG sources using dipole distribution. Conventional methods for EEG source estimation usually assume a few dipoles as sources of brain activities, but this is not always true for practical brain activities. Therefore, the proposed method estimates the dipole distribution on a specific layer of the cerebral cortex by using sulcus and gyrus region models. These models are based on the anatomical structure of cerebral cortex, particularly the pyramidal cell layer. They are also based on a priori knowledge that sensory evoked activity is restricted to the appropriate sensory and association areas of the cerebral cortex such as motor, visual and auditory cortexes. The cerebral cortex model was applied to a three-layer concentric head model consisting of the brain, skull and scalp. The dipole distribution was then estimated by the Moore-Penrose inverse method and by the searching method for all points. In order to evaluate the basic capability of the method, we demonstrated the estimation procedure by computing inverse solutions for sources located within a conducting area. Simulation results and an example EEG analysis indicate that this method and the models were able to discern concentric activities on one layer in the human brain model.

本文言語English
ページ(範囲)1309-1315
ページ数7
ジャーナルAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
2
出版ステータスPublished - 2000
外部発表はい
イベント22nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Chicago, IL, United States
継続期間: 2000 7月 232000 7月 28

ASJC Scopus subject areas

  • 信号処理
  • 生体医工学
  • コンピュータ ビジョンおよびパターン認識
  • 健康情報学

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