Novel biogel may solve a hairy problem for wearable brain-monitoring systems

Electroencephalography (EEG) systems measure electrical brain activity through electrodes placed on the scalp, but getting reliable readings can be surprisingly difficult as hair interferes with contact between the electrodes and skin, and the gels used to improve those connections often dry out over time, weakening signal quality. Researchers at Penn State have developed a reusable material designed to solve both problems at once.