Journal
COMPUTERS IN BIOLOGY AND MEDICINE
Volume 42, Issue 4, Pages 353-363Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compbiomed.2011.11.014
Keywords
Motor tasks; Feature optimization; Brain-computer interface; CSP
Categories
Funding
- National Natural Science Foundation of China [60873125, 30800287, 61031002, 61001172]
- Zhejiang Provincial Natural Science Foundation of China [Y2090707]
- Fundamental Research Funds for the Central Universities
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Either imagined or actual movements lead to a combination of electroencephalography signals with distinctive frequency, temporal and spatial characteristics, which correspond to various motor-related neural activities. This frequency-temporal-spatial pattern is the key of motor intention decoding which is the basis of brain-computer interfaces by motor imagery. We present a new method for motor-related electroencephalography recognition which comprehensively optimizes the frequency-time-space features in a user-specific way. The recognition work focuses on three points: proper time and frequency domain segmentation, spatial optimization based on common spatial pattern filters and feature importance evaluation. We show that by combining the advantages of these optimizational methods, the proposed algorithm effectively improves motor task classification, and the recognized signal chanracteristics can be used to visualize the motor related electroencephalography patterns under different conditions. (c) 2012 Elsevier Ltd. All rights reserved.
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