Ultramicro flexible linear deep brain electrode

Abstract

The invention relates to an ultramicro flexible linear deep brain electrode. The ultramicro flexible linear deep brain electrode comprises an electrode used for stimulating and recording electrical activity of brain neurons, the electrode comprises a plurality of electrode wires, each electrode wire is of a wire-shaped structure made of a platinum-iridium alloy material, the diameter of each electrode wire is 12-13 [mu]m, the lengths of the plurality of electrode wires are unequal, the electrode wires are sequentially arrayed in parallel according to a length increasing sequence, the tips of the plurality of electrode wires are positioned on the same straight line, and the plurality of electrode wires are used for stimulating and recording electrical activities of brain neurons with different depths through the array; and flexible film structures made of a polyimide material are arranged between the electrode wires and on the outer side of the electrode wire array in a coating manner.The ultramicro flexible linear deep brain electrode can effectively avoid non-specific injury, and has the characteristics of strong biocompatibility and capability of measuring the electrical activity of brain neurons at different depths as required. The ultramicro flexible linear deep brain electrode can be used for brain computer interface and deep brain stimulation, and can also be used for cochlear stimulation electrode arrays of artificial auditory sense.

Description

technical field [0001] The invention relates to the technical field of brain electrodes, in particular to an ultra-fine flexible linear deep brain electrode. Background technique [0002] Brain electrode arrays are used for brain-computer interface (brain-machine interface, BMI) acquisition of brain signals, brain stimulation (deepbrainstimulation, DBS), research on nerve-related diseases, reconstruction of nerve functions, such as artificial vision and artificial hearing , brain-controlled robots and other aspects of applied science. The microelectrode array in the brain is mainly used for the recording of multi-channel intra-cerebral electrical signals and multi-channel intra-cerebral micro-stimulation. [0003] At present, the extraction methods for brain signals include: scalp electrical signal extraction (EEG), but its signal is weak and its resolution is poor; intracranial brain surface recording (EcoG), its signal is better and its resolution is better. But it can o...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides an ultra-fine flexible linear deep brain electrode to solve the problem that the existing brain electrodes cannot perform deep stimulation and record neuron electrical activity in the same brain region when used. The electrode includes multiple electrode wires. The diameter of the electrode wire is 12-13 μm, which reduces the contact area with the brain tissue. At the same time, the electrode wires are arranged in order of increasing length, which can stimulate and record the electrical activity of brain neurons at different depths.

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