Noninvasive Electroencephalogram Based Control of a Robotic Arm for Writing Task Using Hybrid BCI System

A novel hybrid brain-computer interface (BCI) based on the electroencephalogram (EEG) signal which consists of a motor imagery- (MI-) based online interactive brain-controlled switch, “teeth clenching” state detector, and a steady-state visual evoked potential- (SSVEP-) based BCI was proposed to pro...

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Bibliographic Details
Published in:BioMed research international 2017-01, Vol.2017 (2017), p.1-8
Main Authors: Chen, Chao, Belkacem, Abdelkader Nasreddine, Dou, Lixiang, Gao, Qiang
Format: Article
Language:English
Subjects:
Accuracy
Adult
Algorithms
Brain-Computer Interfaces
Communication
Control theory
Electroencephalography
Electroencephalography - instrumentation
Emulation
Equipment and supplies
Evoked Potentials, Visual
Female
Human-computer interaction
Humans
Laboratories
Male
Methods
Movement - physiology
Online instruction
Robot arms
Robotics
Robotics - instrumentation
Technology application
Writing
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Summary:A novel hybrid brain-computer interface (BCI) based on the electroencephalogram (EEG) signal which consists of a motor imagery- (MI-) based online interactive brain-controlled switch, “teeth clenching” state detector, and a steady-state visual evoked potential- (SSVEP-) based BCI was proposed to provide multidimensional BCI control. MI-based BCI was used as single-pole double throw brain switch (SPDTBS). By combining the SPDTBS with 4-class SSEVP-based BCI, movement of robotic arm was controlled in three-dimensional (3D) space. In addition, muscle artifact (EMG) of “teeth clenching” condition recorded from EEG signal was detected and employed as interrupter, which can initialize the statement of SPDTBS. Real-time writing task was implemented to verify the reliability of the proposed noninvasive hybrid EEG-EMG-BCI. Eight subjects participated in this study and succeeded to manipulate a robotic arm in 3D space to write some English letters. The mean decoding accuracy of writing task was 0.93±0.03. Four subjects achieved the optimal criteria of writing the word “HI” which is the minimum movement of robotic arm directions (15 steps). Other subjects had needed to take from 2 to 4 additional steps to finish the whole process. These results suggested that our proposed hybrid noninvasive EEG-EMG-BCI was robust and efficient for real-time multidimensional robotic arm control.
ISSN:2314-6133
2314-6141
DOI:10.1155/2017/8316485