In this study, we investigate the feasibility of a BCI based on transcranial Doppler ultrasound (TCD), a medical imaging technique used to monitor cerebral blood flow velocity. We classified the cerebral blood flow velocity changes associated with two mental tasks - a word generation task, and a mental rotation task. Cerebral blood flow velocity was measured simultaneously within the left and right middle cerebral arteries while nine able-bodied adults alternated between mental activity (i.e. word generation or mental rotation) and relaxation. Using linear discriminant analysis and a set of time-domain features, word generation and mental rotation were classified with respective average accuracies of 82.9%and 10.0 across all participants. Accuracies for all participants significantly exceeded chance. These results indicate that TCD is a promising measurement modality for BCI research. © 2011 Myrden et al.
CITATION STYLE
Myrden, A. J. B., Kushki, A., Sejdić, E., Guerguerian, A. M., & Chau, T. (2011). A brain-computer interface based on bilateral transcranial Doppler ultrasound. PLoS ONE, 6(9). https://doi.org/10.1371/journal.pone.0024170
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