This device may nudge your brain into deep sleep

It uses electric current pulsed through the scalp and skull to help the brain flush away harmful waste during deep sleep

As he gets ready for sleep each night, Don Tucker slips on an electrode cap and checks a little computer on his bedside table. Many workers at the private lab, run by the professor emeritus at the University of Oregon, follow the same routine.

The experimental device monitors the nightly voyage through sleep. After sensing light sleep for a few minutes, it pulses electric current through the scalp and skull, nudging the brain into that nirvana known as deep sleep.