An Improved Stimuli System for Brain-Computer Interface Applications

An Improved Stimuli System for Brain-Computer Interface Applications

Irina-Emilia Nicolae (Faculty Electronics, Telecommunications and Information Technology, University Politehnica of Bucharest, Bucharest, Romania)
DOI: 10.4018/ijmstr.2013100101

Abstract

When developing a motion synchronous Brain-Computer Interface, it is very important to have effective stimuli. This research tests and proposes an improved brain computer interface stimulus system, based on event related spectral perturbation. In order to investigate the reaction of the motor cortex to stimuli, the influence of the human senses has to be investigated. Considering the limitations of human senses, the article proposes effective visual and auditory stimuli in two similar tasks, to gain accuracy and better reaction time (RT) for real movements in Brain-Computer Interface synchronous systems.
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2. Methods

The BCI stimulus experiment includes: i) the user, ii) the visual or auditory stimulus system, iii) the control system, and iv) the acquisition system, i.e. the EEG equipment recording. The subject performs left or right hand button press, specific with the provided visual stimuli (left or right arrow), after the attention visual or auditory stimulus is presented.

2.1 Subjects

The experiment was made with a volunteer, male, 27 years old. The subject is right-handed and has normal eyesight and hearing. The experiments were performed in a laboratory environment, with usual visual and audio perturbations, 35 dB background noises. For the moment, we choose only one subject, to implement, test the method and analyze the results. The next future experiment will include more subjects.

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