Max to me after I tucked him into bed, “Wait, Aki, I have a question. Will you try to get some sleep so you won’t lose your mind?” We talked about this over dinner:

Study: Deep Sleep Best for Brain ‘Cleaning,’ Emphasizes Link Between Sleep and Alzheimer’s

https://www.usnews.com/news/national-news/articles/2019-02-27/study-deep-sleep-best-for-brain-cleaning-emphasizes-link-between-sleep-and-alzheimers