Wednesday, April 24, 2019
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Experiment to test the new technique:The researchers propose to use a sensory stimulator in parallel with EEG, and decode whether the stimulation matches (or not) the sensory feedback corresponding to the user's motor intention. The presented experiment simulated a wheelchair turning scenario, and utilized a galvanic vestibular stimulator (GVS). B) The subjects were affixed with GVS electrodes during the EEG recording. The subliminal GVS stimulations induced a sensation of turning either right or left. C) Experiment timeline: In each trial, using stereo speakers and a ‛high' frequency beep, the subjects were instructed to imagine turning either left or right while sitting on a wheelchair. A subliminal GVS stimulation was applied 2 seconds after the end of each cue, randomly either corresponding to turning right or left. This was followed by a rest period of 3 seconds cued by a ‛low' frequency beep (stop cue).

Reading the motor intention from brain activity within 100 ms

Technology
The main challenge of Brain-Computer Interface is to decipher of a human user's movement intention from his brain activity while minimizing the user effort. Although there...

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