MALLEABLE MEMORIES. “Roberto Malinow, professor of neurosciences, said: ‘We can form a memory, erase that memory and we can reactivate it, at will, by applying a stimulus that selectively strengthens or weakens synaptic connections.”
http://www.dailymail.co.uk/health/article-2645740/How-flash-light-delete-bad-memories-Breakthrough-help-dementia-patients.html