Method for assisting evaluation of visual positioning based on brain-computer interface system

Abstract

The invention discloses a method for assisting evaluation of visual positioning based on a brain-computer interface system. The method comprises the steps of 1) stimulating selection, arrangement andexperimental paradigm design; 2) signal acquisition; 3) data processing; 4) statistical test evaluation standard. The method is combined with a behavioral scale evaluation form of CRS-R, a visually newfangled (oddball) paradigm BCI system is constructed to guide a subject so as to stare at a moving target stimulus and score visual positioning according to electroencephalography response, and the accuracy and objectivity of scoring are ensured.

Description

technical field [0001] The present invention relates to the technical field of brain-computer interface technology and electrophysiological visual evoked potential, in particular to a method for assisting evaluation of visual positioning based on a brain-computer interface system. Background technique [0002] Since the discovery of the scalp electroencephalogram (EEG) signal at the beginning of the last century, it has been used in the auxiliary diagnosis of nervous system diseases and the study of brain function. The EEG-based brain-computer interface system allows people to directly communicate with the outside world without the use of traditional nerve-muscle channels. By studying various evoked EEG signals in EEG signals, the mechanism of some specific signals, the spatial position of the signal source and their relationship to obtain the direct information of the brain's response to the external environment, and the brain-computer interface is to achieve An effective ...

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Problems solved by technology

[0007] The purpose of the present invention is to address the subjectivity of the evaluator in the existing clinical diagnosis technology, the evaluator himself is limited by eye movement disorders, and the existing behavioral scale evaluation has vague judgment standards for small behavioral responses, which may easily cause missed detection and other defects, a method based on the brain-computer interface system to assist the evaluation of visual orientation is proposed. This method combines the evaluation form of the CRS-R behavioral scale to construct a BCI system of visual novelty (oddball) paradigm to guide the subjects to understand the moving position. The target stimulus produces gaze and scores its visual orientation according to the EEG response, and ensures the accuracy and objectivity of the score

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