Hair‑Thin Brain Monitoring: Why the Next EEG Might Hide in Your Hair

Have you ever wished the clunky cap and sticky gel of a standard EEG would simply vanish? I have—and scientists at Penn State heard us. They 3‑D‑printed an electrode so slim and flexible it looks like a single human hair, yet it sticks to your scalp and records crisp brain waves for more than a day without irritating gel or bulky wires.

How Does a “Hair” Become an Electrode?

Think of the device as a micro‑lollipop:

Dot‑sized tip — the actual sensor that...