Brain computer interface system evoking P300 based on somatosensory electrical stimulation and implementation method thereof

Abstract

The present invention relates to a brain computer interface system evoking P300 based on somatosensory electrical stimulation and an implementation method thereof, and is technically characterized in that the brain computer interface system comprises a somatosensory electrical stimulation encoder, array type electrical stimulation electrodes, a brain evoked potential detection circuit, and a brain evoked signal processing and classifying module; the somatosensory electrical stimulation encoder can generate electrical stimulation signals connected with input terminals of the array type electrical stimulation electrodes; the array type electrical stimulation electrodes transmit the electrical stimulation signals to different positions of a human body; the brain evoked potential detection circuit acquires signals of reaction of the human brain to the different stimulation positions, and outputs the signals to the brain evoked signal processing and classifying module; and the brain evoked signal processing and classifying module performs feature extraction and classification and identifies and decodes attention selection of the human brain to the different positions. Necessary information of the brain computer interface can be noninvasively obtained without influencing vision and auditory senses of users, and application range of the brain computer interface can be expanded by the novel brain computer interface mode.

Description

technical field [0001] The invention belongs to the field of biomedical information technology, in particular to a brain-computer interface system based on somatosensory electrical stimulation to induce P300 and its implementation method. Background technique [0002] Brain Computer Interface (BCI) is different from the general nerve conduction output pathway, and can establish a direct information exchange channel between the brain and the outside world without going through the normal peripheral nerve and muscle system. The original purpose of researching the BCI system is to provide a way for patients with neurological and motor system diseases to communicate with the outside world, allowing patients to control external devices with their own thinking and consciousness, and further improving the quality of life of patients. As the research on this technology gradually deepens, the brain-computer interface will play a greater application value in many fields such as neurom...

AI Technical Summary

Problems solved by technology

[0005] Existing brain-computer interface systems mainly rely on users to pay attention to visual and / or auditory stimuli. The main disadvantages include: (1) The operation process of the brain-computer interface system has a negative impact on the normal visual and / or auditory process of the user. At the same time, it also has a negative impact on the accuracy of the brain-computer interface system; (2) it is not suitable for people with impaired vision and / or hearing; (3) it does not use somatosensory information and stimulus location information, which limits the brain-computer interface system. Number of combinations of application scenarios and experimental paradigms for machine-to-machine interfaces

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