It’s too soon to get any hopes up yet, but…
This article published in New Scientist contains the desciption of medical experiment consisting in delivering electrical curent to the brain of patients suffering from Alzheimer’s desease. Voltage is delivered to the patient’s brain by two thin implanted wires.
In the first test of this technique in people, two out of the three people who received the treatment showed less of a decline in their mental abilities than people at a similar stage of the disease who didn’t have the surgery… However, a larger randomised control trial is needed to know if the treatment really does work.
The link below will let you know something more about the fascinating method of deep brain stimulation: