Simulation analysis of a wearable dry EEG electrodes for epilepsy monitoring

Wearable electroencephalography (EEG) system can be worn for prolonged periods and have been widely used to reduce susceptibility to artifacts. It can improve localization of epileptic foci, and help doctors to optimize the treatment for patients to control epileptic seizures effectively. Commercial metal-based dry EEG sensors are capable of providing signal acquisition, however it is uncomfortable for patients since the sensor's material property is too hard to wear. In this study, design and fabrication process of dry EEG sensor are proposed for epilepsy monitoring. A medical grade silicone, Polydimethylsiloxane (PDMS), was molded as deformable substrate of the sensor. Virtual prototyping was created and simulated by ANSYS mechanical structural module. Force measurement of the fabricated sensor was conducted and discussed. The actual and simulated of sensor's stiffness were characterized and discussed.