Amnesia

Researchers Find "Lost" Memories

Helen Knight | May 29, 2015

Memories that have been “lost” as a result of amnesia can be recalled by activating brain cells with light.
In a paper published in Science, researchers at Massachusetts Institute of Technology (MIT) reveal that they were able to reactivate memories that could not otherwise be retrieved, using a technology known as optogenetics.

<more at http://www.rdmag.com/news/2015/05/researchers-find-lost-memories; related link: http://clubalthea.com/2015/05/29/blindness-and-amnesia-cure-using-optogenetics/>