1) The key role of sleep appears to be flushing toxins from the brain: http://news.sciencemag.org/brain-behavior/2013/10/sleep-ulti...
2) Sleep disorders appear to precede mental health concerns, including anxiety and depression: http://www.cnn.com/2012/03/30/health/conditions/sleep-apnea-... http://www.adaa.org/understanding-anxiety/related-illnesses/...
Your brain is your performance and health computer. Please remember to take care of it.