Since insomnia and sleep issues commonly plays a role in ADHD, depression, and anxiety I wanted to share a few articles related to sleep. This if the first of 2 or 3. They are more general articles on sleep rather than specifically related to mental health.The quick summary is, per the article, "One of the researchers, Prof Sean Drummond, said: 'We found that insomnia subjects did not properly turn on brain regions critical to a working memory task and did not turn off 'mind-wandering' brain regions irrelevant to the task.'"You can read the full article here: http://www.bbc.co.uk/news/health-23897665