The article title isn't clear - is it saying that the state of the person's memories was 'restored' to what it was when they were 20 years old? Intuitively, th

The article title isn't clear - is it saying that the state of the person's memories was 'restored' to what it was when they were 20 years old? Intuitively, that's just about what I would expect "electrical jolts to the brain" to accomplish, at least in the best case!