Spatio-temporal analysis of P300 using ICA and SSLOFO

Bo Hong, Hesheng Liu, Paul H. Schimpf, Shangkai Gao, Nitish V. Thakor

Research output: Contribution to conferencePaperpeer-review

Abstract

Spatial information of EEG source activity revealed by inverse methods may contribute to an improvement of the BCI systems. This paper proposes an approach that integrates the Independent Component Analysis (ICA) and a newly developed inverse algorithm termed SSLOFO to robustly reconstruct cortical sources of P300. The target independent components are first extracted using a spatio-temporal optimization process and then SSLOFO is employed to localize the sources of the target components. Preliminary studies demonstrate our method is able to localize sources of P300 based on 5-trial-averaged EEG and the results are consistent with the findings of other functional imaging studies such as fMRI. The robustness of our approach is also proved by a study which indicates the P300 sources are stably reconstructed around the left and right TPJ areas.

Original languageEnglish (US)
Pages640-643
Number of pages4
DOIs
StatePublished - Dec 1 2005
Event2nd International IEEE EMBS Conference on Neural Engineering, 2005 - Arlington, VA, United States
Duration: Mar 16 2005Mar 19 2005

Other

Other2nd International IEEE EMBS Conference on Neural Engineering, 2005
CountryUnited States
CityArlington, VA
Period3/16/053/19/05

Keywords

  • BCI
  • ICA
  • Inverse problem
  • P300
  • SSLOFO

ASJC Scopus subject areas

  • Engineering(all)

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