Closing One's eyes Affects amplitude modulation but not frequency modulation in a Cognitive BCI

doi:10.3217/978-3-85125-533-1-31

Paper

Closing One's eyes Affects amplitude modulation but not frequency modulation in a Cognitive BCI

Published Sep 1, 2017 · Marius Goerner, B. Scholkopf, M. Grosse-Wentrup

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Abstract

Cognitive brain-computer interfaces (BCIs) are an auspicious alternative to BCIs based on motor tasks for severely paralyzed patients, e.g., those in late-stages of amyotrophic lateral sclerosis. These patients, however, are often not able to volitionally control their eye lids: Undeliberate eye opening and closing affects modulation of thetaand alpha-rhythms, which impairs decoding performance in cognitive BCIs. Here, we demonstrate on EEG data recorded from nine healthy subjects that a cognitive BCI based on task-induced modulation of the frequency of the parietal alpha-rhythm is more robust to eye lid movements than a BCI based on amplitude modulation. Specifically, we instructed subjects to either open or close their eyes while performing cognitive tasks, and show that closing their eyes decreases decoding performance relative to the eyesopen condition for amplitude modulation but not for frequency modulation features. This insight has important consequences for the design of cognitive BCIs for severely paralyzed patients.

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Study Snapshot

Closing one's eyes while performing cognitive tasks decreases decoding performance for amplitude modulation, but not for frequency modulation features, in cognitive brain-computer interfaces.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

Paper

Closing One's eyes Affects amplitude modulation but not frequency modulation in a Cognitive BCI

References

Citations

Eyes-closed hybrid brain-computer interface employing frontal brain activation

The hybrid brain-computer interface based on frontal brain areas, with higher classification accuracy, could benefit neurodegenerative patients with impaired motor and declining visual functions.