The electroencephalogram (EEG) is one of the few methods of visualizing brain function and is the mainstay of diagnosis of seizure disorders as well as many other neurologic conditions. Conventional EEG devices provide high-quality signals; that is, good signal-to-noise ratio. These devices, however, are not conducive to mobile real-world applications because they are wired devices that tether participants to a given location, limiting the activities they can perform. Furthermore, these devices are not amenable for long-term use because electrodes in these devices typically require electrolytic gel to make contact with the scalp. This dries out over time, thereby reducing signal quality and increasing discomfort due to dried salt deposits. There are currently no viable options for a research-grade EEG device that can be worn for prolonged periods of time and are mobile enough to benefit from participants’ real-world interactions.
An EEG device was developed that is not only affordable, mobile, and wearable, but also provides research-grade signal quality. This EEG device uses silver nanowire-based dry electrodes that produce signal quality comparable to traditional wet electrodes. The sensors are biocompatible and are relatively straightforward to fabricate. Such a device would allow for continuous monitoring of an individual’s brain activity, allowing for the identification of specific biomarkers of individual behaviors in various settings.
Applications include continuous healthcare monitoring, personalized treatment protocols in medicine, and athlete training.