Comparative study analysis of practical EEG sensors in medical diagnoses

Abstract

EEG records the brain's electrical function. It displays the difference in voltages from distinct sites of the brain over a period of time. It plays a major role in understanding the brain. It also helps to diagnose disorders related to sleep, and find the epileptogenic foci in the brain. Recording accurate EEG signals, however, comes with its own limitations. Gels applied to the scalp are abrasive in nature. Gels dry up over time, and also irritate the skin. There are different kinds of electrodes that record EEG signals with appreciable accuracy, keeping comfort and practicality in mind. Some of them are: dry electrodes, capacitive electrodes, electrodes with nanomaterials. The electrodes mentioned above are discussed in this paper. It discusses the advancement in the field of EEG. This paper shows the ease at which signals can be captured, using the aforementioned electrodes. Cheaper, more accessible EEG electrodes are making it possible to bring affordable healthcare outside the confines of the hospitals and clinics.