Visual evoked potential actuated brain computer interface: a brain-actuated cursor system

Author

Lee, P.-L. ; Wu, C.-H. ; Hsieh, J.-C. ; Wu, Y.T.

Author_Institution

Dept. of Electr. Eng., Nat. Central Univ., Jhongda, Taiwan

Volume

41

Issue

15

fYear

2005

fDate

7/21/2005 12:00:00 AM

Firstpage

832

Lastpage

834

Abstract

Flash visual evoked potential (FVEP), induced by OFF-to-ON flash, i.e. flash onset, in a light emitting diode (LED) was used to control four cursor movements (left, right, up, down), and left- and right-button clicks on a screen menu. ON or OFF duration in each flashing sequence was designed to be random so that all flashing sequences were mutually independent. Since FVEPs are time-locked and phase-locked to flash onsets of gazed LEDs, segmenting EEG signals based on the flash onsets of each flashing sequence followed by averaging will sharpen epochs evoked by gazed LEDs. Four inexperienced subjects were asked to generate a sequence of cursor commands. Mean recognition and transfer rates were 88% and 3.74 s/command, respectively.

Keywords

brain; electroencephalography; handicapped aids; light emitting diodes; medical signal processing; visual evoked potentials; EEG signals; OFF-to-ON flash; brain computer interface; brain-actuated cursor system; cursor commands; flash onsets; flash visual evoked potential; flashing sequence; gazed LED; light emitting diode;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el:20050892

Filename

1487733