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Multiresolution analysis over graphs for a motor imagery based online BCI game

Asensio-Cubero, Javier and Gan, John Q and Palaniappan, Ramaswamy (2016) 'Multiresolution analysis over graphs for a motor imagery based online BCI game.' Computers in Biology and Medicine, 68. pp. 21-26. ISSN 0010-4825

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Multiresolution analysis (MRA) over graph representation of EEG data has proved to be a promising method for offline brain-computer interfacing (BCI) data analysis. For the first time we aim to prove the feasibility of the graph lifting transform in an online BCI system. Instead of developing a pointer device or a wheel-chair controller as test bed for human-machine interaction, we have designed and developed an engaging game which can be controlled by means of imaginary limb movements. Some modifications to the existing MRA analysis over graphs for BCI have also been proposed, such as the use of common spatial patterns for feature extraction at the different levels of decomposition, and sequential floating forward search as a best basis selection technique. In the online game experiment we obtained for three classes an average classification rate of 63.0% for fourteen naive subjects. The application of a best basis selection method helps significantly decrease the computing resources needed. The present study allows us to further understand and assess the benefits of the use of tailored wavelet analysis for processing motor imagery data and contributes to the further development of BCI for gaming purposes.

Item Type: Article
Uncontrolled Keywords: BCI game; EEG graph representation; Motor imagery; Wavelet lifting
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Divisions: Faculty of Science and Health
Faculty of Science and Health > Computer Science and Electronic Engineering, School of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 13 Nov 2015 14:35
Last Modified: 15 Jan 2022 00:23

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