Separate EEG Stem Electrodes

Abstract

The invention discloses a new type of EEG detection dry electrode based on a spring structure, which is easy to use, does not require time-consuming and complicated preparations, gets rid of the traditional EEG detection electrode's dependence on conductive paste, and can realize long-term EEG monitoring; Layered circuit board, combined with metal probes to form a closed Faraday cage, the amplifier circuit is located in the cage, which can reduce the interference of environmental electromagnetic signals on EEG signals. The dry electrode and the electrode cap are separated, so that the surface of the dry electrode can be cleaned conveniently; long electrodes or short electrodes can be selected according to the needs, which is conducive to adapting to different head sizes and shapes. This electrode is used in the diagnosis and treatment of neurological diseases, brain It has wide application prospects in machine interface and limb rehabilitation.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a separate brain electrical stem electrode. Background technique [0002] The development and aging of the brain, learning and memory, and advanced cognitive functions are closely related to humans. Understanding the structure and function of the brain is the ultimate challenge for humans to understand the world and self. Brain research is considered to be the most exciting research field today. It is not only of great theoretical significance, but also has important practical significance for improving the national health level, quality of life, innovation ability, psychological and spiritual state. The key to brain cognition is the detection of brain nerve information. Scalp electroencephalogram signal (EEG) is the cortical potential transmitted by the spontaneous electrical activity of cerebral cortex nerve cell clusters to the scalp. The detection and analysis of EEG signa...

AI Technical Summary

Problems solved by technology

First, the amplitude of the EEG signal is very small, but the output impedance is very high, and contains low-frequency components close to direct current; second, the signal-to-noise ratio of the EEG signal is low, and it is easily affected by power frequency signals, EMG signals and environmental noise; Third, the EEG detection must consider the physiological nature of the subject and ensure the safety of the operation, etc.

At present, wet electrodes are usually used for EEG acquisition. Before the EEG acquisition, the subjects must apply a conductive medium to reduce the ultra-high impedance of the stratum corneum, so that the amplifier can work normally, but this process needs to be carried out with the assistance of outsiders. cost longer

In addition, traditional EEG acquisition systems generally use wired EEG amplification equipment, which is restricted by the environment, and generally can only be used for EEG acquisition on specific occasions

For patients who need EEG testing, it is necessary to go to the EEG testing department of the hospital for special testing. At the same time, due to the aperiodicity of EEG signals, pathological signals in EEG appear randomly. Therefore, in order to obtain accurate diagnostic results, a longer period of EEG is required. This has caused economic burden and time loss to patients, and the long process of seeing a doctor has also brought a huge load to the outpatient department of the hospital.

At present, the existing EEG signal detection electrodes cannot meet the needs of wireless real-time long-term monitoring of EEG signals, and there is an urgent need to research and manufacture new dry electrodes suitable for EEG signal detection in the haired area with high sensitivity and strong stability.

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