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Transcranial electric stimulation device and method for improving motor imagery ability in brain-computer interface

A technology of motor imagery and electrical stimulation, applied in the input/output of user/computer interaction, computer components, mechanical mode conversion, etc. Advanced problems, to achieve the effect of large amplitude, improve classification accuracy, and improve execution efficiency

Inactive Publication Date: 2017-03-15
TIANJIN UNIV
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Problems solved by technology

However, due to individual differences, some subjects have no obvious ERD and ERS phenomena when performing motor imagery, which leads to a low correct rate of MI-BCI and low execution efficiency, which affects the effective use of MI-BCI

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  • Transcranial electric stimulation device and method for improving motor imagery ability in brain-computer interface

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Embodiment Construction

[0041]A method of transcranial electrical stimulation capable of improving motor imagery in brain-computer interfaces is proposed. Motor imagery refers to the cognitive behavior that the subject only imagines the movement of the limb without actually moving it. Motor imagery brain-computer interface (MI-BCI) is a brain-computer interface device based on the detection of motor imagery neural activity in the brain. Time-frequency analysis of the EEG signals during motor imagery shows that in the 8-12 Hz frequency band, the energy of the contralateral brain area of ​​motor imagery decreases, and the energy of the ipsilateral brain area increases, which are called event-related desynchronization ( ERD, Event-Relevant Desynchronization) and event-related synchronization (ERS, Event-Relevant Synchronization). Transcranial Electrical Stimulation (tES, Transcranial Electric Stimulation) is a non-invasive extracranial brain stimulation technology, which acts on the human brain through...

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Abstract

The invention relates to the brain-computer interface technology and medical treatment and rehabilitation instruments, and provides a neuromodulation method for improving the motor imagery ability in the brain-computer interface. By means of the method, the control efficiency of the MI-BCI can be effectively improved, the correctness of the MI-BCI can be improved, and considerable social benefits and economic benefits can be gained. According to the technical scheme of the transcranial electric stimulation device and method for improving the motor imagery ability in the brain-computer interface, before the MI-BCI is used, transcranial electric stimulation with a certain frequency is applied to the primary motor cortex of the human brain to adjust the ERD and ERS amplitude and distribution during motor imagery. The transcranial electric stimulation device and method are mainly applied to the occasions of designing and manufacturing of medical treatment and rehabilitation instruments adopting the brain-computer interface.

Description

technical field [0001] The invention relates to brain-computer interface technology, medical treatment and rehabilitation equipment, and specifically relates to a transcranial electrical stimulation method for improving motor imagination ability in brain-computer interface. Background technique [0002] Brain Computer Interface (BCI, Brain Computer Interface) refers to the direct communication and control channel established between the human brain and computers or other electronic devices. It mainly infers people's thoughts and purposes by collecting people's EEG signals, preprocessing, feature extraction, pattern recognition and other links, so as to meet the needs of human brain and external equipment communication. Currently commonly used brain-computer interface paradigms include SSVEP-based brain-computer interface, P300-based brain-computer interface, and MI-based brain-computer interface (MI-BCI). Among them, MI-BCI is a brain-computer interface device based on the ...

Claims

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Application Information

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IPC IPC(8): G06F3/01
CPCG06F3/015
Inventor 穆思雨张立新许敏鹏何峰赵欣杨佳佳明东
Owner TIANJIN UNIV
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