GO-STOP control using optical brain-computer interface during calculation task

Kei Utsugi, Akiko Obata, Hiroki Sato, Ryuta Aoki, Atsushi Maki, Hideaki Koizumi, Kazuhiko Sagara, Hiroaki Kawamichi, Hirokazu Atsumori, Takusige Katura

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


We have developed a prototype optical brain-computer interface (BCI) system that can be used by an operator to manipulate external, electrically controlled equipment. Our optical BCI uses near-infrared spectroscopy and functions as a compact, practical, unrestrictive, non-invasive brain-switch. The optical BCI system measured spatiotemporal changes in the hemoglobin concentrations in the blood flow of a subject's prefrontal cortex at 22 measurement points. An exponential moving average (EMA) filter was applied to the data, and then their weighted sum with a taskrelated parameter derived from a pretest is utilized for time-indicated control (GO-STOP) of an external object. In experiments using untrained subjects, the system achieved control patterns within an accuracy of ± 6 sec for more than 80% control.

Original languageEnglish
Pages (from-to)2133-2141
Number of pages9
JournalIEICE Transactions on Communications
Issue number7
Publication statusPublished - 2008
Externally publishedYes


  • Brain switch
  • Brain-computer interface
  • NIRS
  • Optical topography
  • Prefrontal cortex

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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