P300-based brain-computer interface: The effect of the stimulus position in a stimulus train

Ganin, I.P.; Shishkin, S.L.; Kochetova, A.G.; Kaplan, A.Y.

Авторы: Ganin I.P., Shishkin S.L., Kochetova A.G., Kaplan A.Y.
Журнал: Human Physiology
Том: 38
Номер: 2
Год издания: 2012
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 121
Последняя страница: 128
Аннотация: The most popular type of braincomputer interfaces (BCIs) are based on the detection of the P300 wave of the evoked potentials appearing in response to a stimulus chosen by the subject. In order to increase the speed of operation of these BCIs, it is possible to decrease the number of repeated stimulus presentations. It is associated with an increase in the relative importance of the response to the first stimulus in a train for correct recognition of the stimulus chosen. Eventrelated potentials (ERPs) in response to the first stimulus presentations are known to have their own specificity. Particularly, in many cases, the amplitude of the response to the first presentations is enhanced, which makes it very suitable for recognition in a BCI. However, this effect has not been studied to date. In this study, the ERPs recorded in healthy subjects in a standard BCI paradigm (n = 14) with ten presentations of stimuli or during tripletrial (n = 6) and singletrial (n = 6) presentations of stimuli in a modified BCI paradigm with moving objects have been analyzed. In both cases, first presentations of the target stimuli or singletrial presentation of the target stimulus were associated with higher amplitudes of ERPs. The opportunity to use specific differences between the responses to the first or singletrial presentations and the responses to later stimuli during their repeated presentations for improving highspeed operations in the P300based BCI is discussed.
Добавил в систему: Ганин Илья Петрович

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