Brain electrical and magnetic fields from verbal cognitive activities evoked by a visual task

Seiji Nakagawa, Keiji Iramina, Shoogo Ueno

研究成果: Contribution to journalConference article査読

抄録

This study focuses on the investigation of higher brain function using electroencephalogram (EEG) and magnetoencephalogram (MEG) techniques. We observed verbal cognitive activities by measuring EEGs and MEGs evoked by visually cognitive tasks. English words, meaningless sets of letters, and simple flashes were presented. We analyzed the EEG and MEG data with a subtraction technique and topographic maps. Visual evoked potentials (VEPs) associated with cognition of meanings were obtained by subtracting VEPs evoked by random letters from VEPs evoked by English words. The topographic EEG maps in several subjects show a clear interhemispheric difference between latencies of 300 and 600 msec. The EEG maps in a few subjects, however, show no interhemispheric differences.

本文言語英語
ページ(範囲)173-174
ページ数2
ジャーナルAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
16
pt 1
出版ステータス出版済み - 12 1 1994
イベントProceedings of the 16th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 1 (of 2) - Baltimore, MD, USA
継続期間: 11 3 199411 6 1994

All Science Journal Classification (ASJC) codes

  • 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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