Visual cortex nerve stimulating device and stimulating method

Abstract

The invention relates to a microelectrode array stimulation device that can stimulate visual cortical nervous tissue and the stimulation method. The device can output electric stimulation signal alternatively through different stimulation points under action of control circuit, to stimulate visual cortical nervous tissue. The device comprises microelectrode array chip, signal path control part, stimulation signal generation part and coding part. The microelectrode array chip is constructed with a plurality of stimulation unit arrays on one base plate, each stimulation unit is corresponding to one stimulation position on visual cortical nervous tissue, and includes a plurality of ultra micro-stimulation points formed with a plurality of microelectrodes. The signal path control part selects the connection way of stimulation signal and ultra-micro stimulation point in stimulation unit and control visual cortical stimulation mode, couples stimulation signal to visual cortical nervous tissue through selected ultra-micro electrode couple. The invention can realize automatic stimulation for visual cortical nervous tissue and increase life length for stimulation electrode.

Description

technical field [0001] The invention relates to a technique for stimulating nerve tissue of visual cortex. Background technique [0002] According to incomplete statistics, more than 45,000,000 people are blind in the world. Any abnormality in any part of the visual transmission pathway will cause damage or loss of visual function. At present, the medical community has tried to use various methods such as drugs, laser, radiation, cell transplantation and macular transposition surgery, but each has certain indications and shortcomings, and the curative effect is not satisfactory. [0003] From the perspective of vision formation and visual information transmission pathways, visual function restoration can be carried out at three levels: retina, optic nerve, and visual cortex, but the existing research results and technical level are still difficult to effectively achieve visual restoration. At present, the hot spot of research at home and abroad ...

AI Technical Summary

Problems solved by technology

[0005] However, the applicant has found through long-term research that while the stimulating electrode is electrically stimulating the cortical nerve tissue, the nerve tissue will show a rejection reaction to the stimulation electrode; and with the prolongation of the continuous stimulation time, the rejection reaction will be enhanced , resulting in a decrease in the stimulation efficiency of the stimulating electrodes, so that the working effectiveness of the stimulating electrodes

Therefore, the effective working time of the existing cortical neural interface microelectrodes has great limitations, and it also faces the same problem in the study of visual cortical stimulation.

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