Implantable sheet type optic nerve micro stimulating electrode

Abstract

An implantable sheet-type optic nerve micro-stimulation electrode in the field of biomedical engineering technology, comprising: an electrode base, a micro-electrode, an electrode inner lead, a lead base, a lead interface and a cable bundle. The micro-electrodes are distributed on the electrode substrate and protrude from the surface of the electrode substrate. In the horizontal direction, two or more micro-electrodes form micro-electrode pairs, and the space between the formed micro-electrode pairs is staggered in the vertical direction; The inner lead connects the microelectrode and the lead interface, and walks on the surface or between layers of the electrode substrate; the lead substrate and the electrode substrate are directly connected; the lead interface is distributed on the surface of the lead substrate; the cable bundle is composed of cables connecting the lead interface and external equipment . The invention can effectively stimulate the optic nerve fibers, and the optic nerve fibers conduct the stimulation current generated by the stimulator to the visual cortex, so that the visual cortex can generate excitation similar to that generated after the retina is stimulated by light, thereby generating phosphenes and recording the potential of the optic nerve fibers.

Description

technical field [0001] The invention relates to an electrode in the technical field of biomedical engineering, in particular to an implantable sheet-type optic nerve micro-stimulation electrode. Background technique [0002] For eyes with normal visual function, the objects watched by the outside world can be imaged on the retina, and the photoreceptor cells on the retina convert the image signal into a bioelectrical signal, and then pass through the retinal nerve composed of horizontal cells, bipolar cells and ganglion cells. After the network preliminarily processes the bioelectrical signals of photoreceptor cells, the visual nerve fibers sent by ganglion cells are transmitted to the visual cortex of the brain, and the visual cortex of the brain reprocesses the obtained bioelectrical signals to perceive and produce vision. However, some diseases, such as retinitis pigmentosa and age-related macular degeneration, will affect the photoreceptor cells of the retina, destroying...

AI Technical Summary

Problems solved by technology

The invention uses electric field stimulation instead of current stimulation, and the efficiency and accuracy of electric field stimulation are not as good as current stimulation

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