We all do it. We all need a certain amount of it. If we don’t get enough, we are cranky the next day. If we don’t get enough for several days then we are unable to function normally during the day. Sleep is critically important to life and abnormalities of sleep has been established as a risk factor for many health issues including cognitive decline. In this video, Dr. Tipton discusses sleep and the stages that we must go through to get the rest and rejuvenation that our bodies need.