ИСТИНА

Electroencephalography is widely used for brain cognition research and clinical diagnosis by using electrodes along the scalp skin to detect and analyze the brain's biopotential. Electrodes are essential in electroencephalography, acting as the connection between the brain's electrical activity and the technology used for signal acquisition and transmission. The rapid and simple placement of electrodes is a significant advantage for electroencephalography recording, especially of children and individuals with nervous system disorders, who may have difficulty remaining still for an extended period during the preparation process. Conductive hydrogels based on poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), iota-carrageenan, and polyvinyl alcohol, offer a promising alternative to standard electrodes by providing high conductivity, biocompatibility, mechanical stability. The use of our original design of hydrogel-based electrodes instead of the most frequently used cup electrodes made of Ag/AgCl significantly improves the process of recording electroencephalography, reducing the patient preparation time to 20 minutes instead of more than 40 minutes, eliminating the need to degrease the scalp before the procedure while providing comparable recording quality within 20%. This method also enables successful signal registration in individuals with skull bone defects, broadening its applicability in diverse clinical scenarios. These advancements streamline the electroencephalography process, improve patient comfort, and expand the technology's utility in medical diagnostics.