Detection of Hand Extension Movements in the Context of a 3-State Asynchronous Brain Interface

The low-frequency asynchronous switch design (LF-ASD) is a direct brain interface (BI) that detects the presence of a specific finger movement in the ongoing EEG. Asynchronous interfaces have the advantage of being operational at all times and not only at specific system-defined periods. In this pap...

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Bibliographic Details
Main Authors: Bashashati, A., Ward, R.K., Birch, G.E.
Format: Conference Proceeding
Language:English
Subjects:
Bismuth
Brain computer interfaces
Computer interfaces
Detectors
Electrodes
Electroencephalography
Electrooculography
Feature extraction
Fingers
Switches
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Summary:The low-frequency asynchronous switch design (LF-ASD) is a direct brain interface (BI) that detects the presence of a specific finger movement in the ongoing EEG. Asynchronous interfaces have the advantage of being operational at all times and not only at specific system-defined periods. In this paper, we present the design of a 3-state asynchronous BI for the detection of two different movements from the ongoing EEG. The proposed 3-state asynchronous BI detects right and left hand extensions. Using data collected from two able-bodied individuals, it is shown that the error characteristics of the new system in detecting the presence of movement are significantly better than the 2-state LF-ASD, with true positive rate increases of up to 22.4% for false positive rates in the 1-2% range. An average performance of 61.5% was achieved in differentiating between left and right hand movements
ISSN:1520-6149
2379-190X
DOI:10.1109/ICASSP.2006.1661421