Researchers have found that a person’s memory can be improved by stimulating areas deep inside the brain with electrical current, a finding that offers hope for nonpharmaceutical, noninvasive treatments that could boost memory impaired by Alzheimer’s disease, stroke, traumatic brain injury or aging.
source:
http://www.washingtonpost.com/natio...1f1978-2ec8-11e4-9b98-848790384093_story.html
http://www.sciencemag.org/content/345/6200/1054