Kelly, S.P. and Lalor, E.C. and Finucane, C. and McDarby, G. and Reilly, R.B., Visual spatial attention control in an independent brain-computer interface, IEEE Transactions on Biomedical Engineering, 52, 9, 2005, 1588, 1596
IEEE Transactions on Biomedical Engineering 52 9
This paper presents a novel brain computer interface
(BCI) design employing visual evoked potential (VEP) modulations
in a paradigm involving no dependency on peripheral
muscles or nerves. The system utilizes electrophysiological correlates
of visual spatial attention mechanisms, the self-regulation
of which is naturally developed through continuous application
in everyday life. An interface involving real-time biofeedback is
described, demonstrating reduced training time in comparison
to existing BCIs based on self-regulation paradigms. Subjects
were cued to covertly attend to a sequence of letters superimposed
on a flicker stimulus in one visual field while ignoring a similar
stimulus of a different flicker frequency in the opposite visual
field. Classification of left/right spatial attention is achieved by extracting
steady-state visual evoked potentials (SSVEPs) elicited by
the stimuli. Six out of eleven physically and neurologically healthy
subjects demonstrate reliable control in binary decision-making,
achieving at least 75% correct selections in at least one of only five
sessions, each of approximately 12-min duration. The highest-performing
subject achieved over 90% correct selections in each of
four sessions. This independent BCI may provide a new method of
real-time interaction for those with little or no peripheral control,
with the added advantage of requiring only brief training.
Please note: There is a known bug in some browsers that causes an
error when a user tries to view large pdf file within the browser window.
If you receive the message "The file is damaged and could not be
repaired", please try one of the solutions linked below based on the
browser you are using.
Items in TARA are protected by copyright, with all rights reserved, unless otherwise indicated.