Alzheimer's breakthrough: 2 hrs of sleep restored without clearing brain plaques

So does this help alleviate the dementia symptoms? Or do those remain but at least the patients get better sleep?

From what I know about terminal lucidity in alzheimer's patients it seems to me that these plaques act like electrical resistors that increase the impedance for neurotransmission. But chemically of course. So if you push more current through the system, such as when you're dying, you can suddenly access memories that were locked off. Is my understanding correct?

...in mice.

Not knocking the research, cure it already! I just think it should be in the title to avoid false hope.