Brain-computer interface paradigm based on frequency-variable flicker stimulation
A computer interface and paradigm technology, applied in the field of brain-computer interface, can solve problems such as limited and limited control options, and achieve the effect of high signal-to-noise ratio and high stability
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[0016] A brain-computer interface (BCI) paradigm for visual stimulation based on frequency conversion signal modulation is designed. When a normal person receives a flicker stimulation of a certain frequency (generally greater than 6 Hz), the corresponding brain electricity will have a response consistent with the stimulation frequency or its harmonics. This response is the so-called steady state visual evoked potential (SSVEP). If the stimulation frequency is changed in a specific pattern, the frequency characteristics of its brain electrical signal will also produce a corresponding change pattern. The device design changes the traditional single-frequency visual stimulation mode into a visual stimulation mode modulated by frequency conversion signals, thereby inducing corresponding frequency conversion visual evoked potentials.
[0017] The technical process is: design a new paradigm experiment, set up the EEG signal acquisition device required for the experiment, and then coll...
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