Micro needle array electrode for optic nerve prosthesis

Abstract

The invention discloses a micro needle array electrode for an optic nerve prosthesis. The micro needle array electrode comprises an electrode substrate, a micro needle array formed on the electrode substrate, and a first material layer embedded at a lower side of the electrode substrate, wherein the first material layer is used for deforming under the external stimulus condition to make the micro needle array electrode to realize integral curling. The micro needle array electrode is advantaged in that deformation is generated under the external stimulus condition, and the micro needle array electrode can adapt to optic tracts which are in different shapes and have different sizes.

Description

technical field [0001] The invention relates to the field of medical equipment and bio-MEMS, in particular to a ring-shaped microneedle array electrode used for optic nerve prosthesis. Background technique [0002] All the optic nerve fibers are assembled on the optic nerve bundle of the eyeball. The optic nerve prosthesis is an artificial prosthesis placed on the optic nerve bundle at the back of the eye. Even patients with missing eyeballs bring hope of partial restoration of vision. [0003] The optic nerve is a bundle of nerve tissue located behind the eyeball. It is densely packed with multiple optic ganglion cell axons connected to the retina, and is responsible for transmitting the visual signals generated by the retina to the cerebral cortex. In most cases, even if the retina or eyeball is damaged, the optic nerve can still maintain a certain function. Applying electrical stimulation to it can cause local ganglion cells to excite, generate action potentials, and ind...

AI Technical Summary

Problems solved by technology

[0005] Pre-curved microelectrodes will be very inconvenient for implantation, and if the ring-shaped microelectrodes are curled before they are placed in place, it will be difficult for the microneedle array on the microelectrode to penetrate the fascicular optic nerve. It is also difficult to guarantee the accuracy of the spatial position after the microneedle is inserted.

There are individual differences in the human body, and the shape of the microelectrodes needs to be adjusted according to the different shapes and sizes of the optic nerve bundles, otherwise the anchoring effect of the microelectrodes will be affected, and the mapping relationship between the electrical stimulation and the visual response of the optic nerve prosthesis control system will change. Become unstable, affecting the overall performance of the optic nerve prosthesis

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