Properties of EEG Responses to Emotionally Significant Stimuli Using a P300 Wave-Based Brain–Computer Interface

Ganin, I.P.; Kosichenko, E.A.; Kaplan, A.Y.

Авторы: Ganin I.P., Kosichenko E.A., Kaplan A.Ya
Журнал: Neuroscience and Behavioral Physiology
Том: 48
Номер: 9
Год издания: 2018
Издательство: Kluwer Academic/Plenum Publishers
Местоположение издательства: United States
Первая страница: 1093
Последняя страница: 1099
DOI: 10.1007/s11055-018-0672-7
Аннотация: A P300 wave-based brain–computer interface (BCI-P300) allows a person’s focus of attention to a particular stimulus on the computer screen to be detected in terms of characteristic EEG features which discriminate reactions to target and nontarget stimuli. In the standard BCI-P300 paradigm, the subject’s attention on one or another stimulus is dictated by clear practical interest in the stimulus, the experimenter’s instructions, or the deviance of this stimulus resulting from clear differences from other stimuli. We report here studies of the characteristics of the perception of stimuli presented in the oddball paradigm with subjective emotional significance for the subject. The possibility of using the BCI-P300 to detect unclear foci of attention is tested. This technology can presumptively be used to assess people’s ability to perceive emotiogenic stimuli, which may be useful for the instrumented diagnosis of accentuated states or impairments to emotional perception, for example in autism. The study in 14 subjects showed that the recognition accuracy of emotiogenic stimuli using the BCI on passive presentation (in the absence of a stimulus discrimination task) was statistically significantly greater than the random level by a factor of greater than two. Furthermore, the features of the components of potentials were identified on presentation of images with different contents and in conditions of low and elevated levels of attention to the stimuli being presented. The results confirm the hypothesis that the BCI-P300 paradigm can be used to detect unclear foci of attention on external stimuli in humans and supplement existing knowledge of the cerebral mechanisms responsible for the unconscious perception of subjectively significant stimuli.
Добавил в систему: Каплан Александр Яковлевич

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