Scientists Zap Sleeping Humans' Brains with Electricity to Improve Their Memory

"A little brain stimulation at night appears to help people remember what they learned the previous day," reports NPR — a finding that could one day help people with memory problems, sleeps issues, or depression:A study of 18 people with severe epilepsy found that they scored higher on a memory test if they got deep brain stimulation while they slept, a team reports in the journal Nature Neuroscience.The stimulation was delivered during non-REM sleep, when the brain is thought to strengthe