Earlier this year, neurosurgeon Andres Lozano published a startling finding. He was testing deep-brain stimulation, in which electrical current is delivered directly to the brain, as a treatment for obesity. The patient's weight showed little change, but his memory improved significantly. Lozano has now formed a company to ...

Applying a gentle electric current to the brain during sleep can significantly boost memory, University of Luebeck researchers report. They believe this is due to the pattern of the applied current mimicking that seen in naturally occurring deep s...