Application of hydrogel in preparation of electrodes of cortex electrograph for detection

Abstract

The invention discloses application of hydrogel in preparation of electrodes of a cortex electrograph for detection. According to a cortex electrograph collection technique, the hydrogel with low conductivity is used as the electrodes for the first time. The hydrogel in a cerebrum liquid environment can achieve electric conduction through dissociative ions in the environment, and by means of the directional movement of the ions, electric current is generated and a detection effect similar to highly-conductive materials can be achieved. Meanwhile, the hydrogel can be matched with brain tissuesperfectly in the mechanical property and tightly fitted with the cerebral cortex. By means of the great biocompatibility of the hydrogel, biological rejection can be avoided. Through the application,not only can the physiological performance of traditional cortex electrographs be greatly improved, but also it is likely to achieve cortex electrograph recording for a long time in order to achieve more functions.

Description

technical field

[0001] The invention relates to the application of a hydrogel with low electrical conductivity, in particular to the application of a hydrogel in preparing electrodes for detecting electrocorticograms. Background technique

[0002] Electrocorticography is an essential technique in the Montreal course (used in the treatment of epilepsy in critically ill patients). EEG cortical potentials were recorded to identify the cortical regions producing seizures. This area of ​​cortex is then surgically removed to remove the source of the seizures. It is generally believed that the signals emitted by brain cells are weak, and those skilled in the art usually use metal materials with high electrical conductivity as detection electrodes for brain signals. However, metal electrodes have extremely high hardness and poor biocompatibility, and different conduction principles from the brain (the brain conducts ions while the metal conducts electrons). During use, metal elec...

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