Ions may be in charge of when you sleep and wake
Potassium spike in the brain, not nerve activity, causes eye-opening jolt
ION COCKTAIL Changing levels of certain ions in the brain may lull mice (and probably humans) to sleep and rouse them again, a new study suggests.
Chris Clogg/flickr
To rewrite an Alanis Morissette song, the brain has a funny way of waking you up (and putting you to sleep).