System and method for improving auditory steady-state response brain-computer interface performance

Abstract

The invention relates to a system and method for improving auditory steady-state response brain-computer interface performance. The system comprising a brain-Computer interface system and transcranialelectrical stimulation system; the brain-computer interface system comprises a computer, an auditory stimulator and an EEG signal acquisition module, Computers and Auditory Stimulators, EEG signal acquisition module is connected, the subjects received the stimulation sound from the auditory stimulator through the air-conductive headphones attached to both ears, EEG signal acquisition module is connected with that cerebral cortex of the subjects through EEG cap electrode. The auditory stimulator generates three different frequencies of stimulation, which are applied to the subjects through theair-conduction earphones. The transcranial electrical stimulation system applies specific electrical current to the target area of the subjects. The EEG signal acquisition module collects EEG signalsthrough the EEG cap electrode and transmits them to the computer for processing. The invention combines the transcranial electrical stimulation system into the brain-computer interface system, and improves the auditory steady-state response signal-to-noise ratio of the auditory steady-state response in the brain-computer interface, which brings convenience to practical applications.

Description

technical field [0001] The invention belongs to the technical field of brain-computer interface, in particular to a system and method for improving the performance of brain-computer interface in steady-state response of hearing. Background technique [0002] Brain-computer interface (brain-computer interface, BCI) provides users with a communication and control channel that does not depend on the normal output of the brain, and directly converts brain signals of brain activity into control commands for external devices such as computers. It is commonly used on communication media or transport aids for patients with severe neuromuscular disorders as well as severe movement disorders. [0003] At present, brain-computer interface has become a research hotspot. Eye movements in patients with locked-in syndrome will be affected to a certain extent, which in turn affects the application of visually evoked potential brain-computer interfaces. The brain-computer interface system ...

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Problems solved by technology

However, none of the above methods involve the modulation of the homeostatic response of transcranial direct current stimulation to the auditory state.

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