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Extracting Rhythmic Brain Activity for Brain-Computer Interfacing through Constrained Independent Component Analysis
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Wang, Suogang and James, C. J. (2007) Extracting Rhythmic Brain Activity for Brain-Computer Interfacing through Constrained Independent Component Analysis. Computational Intelligence and Neuroscience, 2007 . pp. 1-9. doi:10.1155/2007/41468 ISSN 1687-5265.
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Official URL: http://dx.doi.org/10.1155/2007/41468
Abstract
We propose a technique based on independent component analysis (ICA) with constraints, applied to the rhythmic electroen-cephalographic (EEG) data recorded from a brain-computer interfacing (BCI) system. ICA is a technique that can decompose the recorded EEG into its underlying independent components and in BCI involving motor imagery, the aim is to isolate rhythmic activity over the sensorimotor cortex. We demonstrate that, through the technique of spectrally constrained ICA, we can learn a spatial filter suited to each individual EEG recording. This can effectively extract discriminatory information from two types of single-trial EEG data. Through the use of the ICA algorithm, the classification accuracy is improved by about 25%, on average, compared to the performance on the unpreprocessed data. This implies that this ICA technique can be reliably used to identify and extract BCI-related rhythmic activity underlying the recordings where a particular filter is learned for each subject. The high classification rate and low computational cost make it a promising algorithm for application to an online BCI system.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||
Journal or Publication Title: | Computational Intelligence and Neuroscience | ||||
Publisher: | Hindawi Publishing Corporation | ||||
ISSN: | 1687-5265 | ||||
Official Date: | 2007 | ||||
Dates: |
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Volume: | 2007 | ||||
Page Range: | pp. 1-9 | ||||
DOI: | 10.1155/2007/41468 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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