Classifying EEG signals preceding right hand, left hand, tongue, and right foot movements and motor imageries Article

Morash, V, Bai, O, Furlani, S et al. (2008). Classifying EEG signals preceding right hand, left hand, tongue, and right foot movements and motor imageries . 119(11), 2570-2578. 10.1016/j.clinph.2008.08.013

cited authors

  • Morash, V; Bai, O; Furlani, S; Lin, P; Hallett, M

fiu authors

abstract

  • Objective: To use the neural signals preceding movement and motor imagery to predict which of the four movements/motor imageries is about to occur, and to access this utility for brain-computer interface (BCI) applications. Methods: Eight na├»ve subjects performed or kinesthetically imagined four movements while electroencephalogram (EEG) was recorded from 29 channels over sensorimotor areas. The task was instructed with a specific stimulus (S1) and performed at a second stimulus (S2). A classifier was trained and tested offline at differentiating the EEG signals from movement/imagery preparation (the 1.5-s preceding movement/imagery execution). Results: Accuracy of movement/imagery preparation classification varied between subjects. The system preferentially selected event-related (de)synchronization (ERD/ERS) signals for classification, and high accuracies were associated with classifications that relied heavily on the ERD/ERS to discriminate movement/imagery planning. Conclusions: The ERD/ERS preceding movement and motor imagery can be used to predict which of the four movements/imageries is about to occur. Prediction accuracy depends on this signal's accessibility. Significance: The ERD/ERS is the most specific pre-movement/imagery signal to the movement/imagery about to be performed.

publication date

  • November 1, 2008

Digital Object Identifier (DOI)

start page

  • 2570

end page

  • 2578

volume

  • 119

issue

  • 11