Composite electrode for recording deep brain signals

Abstract

The invention relates to a composite electrode for recording deep brain signals. The composite electrode comprises at least one large electrode contact capable of recording local field potential and at least one microelectrode contact capable of recording single cells in brain tissue and is characterized in that a large electrode wire and a microelectrode wire are arranged in the composite electrode, the large electrode wire is electrically connected with the large electrode contact, and the microelectrode wire is electrically connected with the microelectrode contact. The composite electrode has the advantages that single cell potential and local field potential in the brain tissue can be recorded at the same time, a good recording effect is achieved, electric signals can be well collected and clearly displayed even when the electric signals are weak, and the composite electrode is of great significance and value to the diagnosis, treatment and researches of various neurologic diseases such as epilepsy.

Description

technical field [0001] The invention relates to a medical device in the medical field, in particular to a composite electrode for recording deep brain electrical signals. Background technique [0002] EEG is a modern auxiliary examination method that amplifies and records the weak bioelectricity of the brain itself into a graph through an electroencephalograph to help diagnose diseases. Scalp electrode EEG is a graph obtained by amplifying and recording the spontaneous electrical activity of the brain from the scalp. The EEG signal passes through the amplifier (because the EEG signal is very weak, it is at the mv or uv level, and it has to be attenuated by the skull and scalp, so it needs to be amplified by millions of times before it can be displayed), filter (reduce interference) and finally form The graphics we see. It does not cause any trauma to the examinee. [0003] The incidence of epilepsy is about 0.8%, of which 1 / 3 is drug-resistant epilepsy, and about 12% can ...

AI Technical Summary

Problems solved by technology

Strip electrodes and grid electrodes need craniotomy to complete the insertion, and they cannot reach the deep part of the brain, and it is difficult to insert into the interhemispheric fissure and skull base. In recent years, their application has gradually decreased.

However, the application of stereotactic EEG with stereotactic EEG electrodes has increased significantly. This kind of electrode can reach any part of the brain to record EEG, but this kind of electrode can only record the field potential, and cannot find the real EEG. The cells that first start to discharge have certain defects in the acquisition accuracy, which leads to the inability to accurately predict many epileptic foci, and also affects the development of brain function research.

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