Sleep is one of the most important aspects in maintaining overall health. Regularly sleeping 6 to 8 hours a night will boost a person's physical and psychological state. But with too much or too little sleep, a person runs the risk of developing cardiovascular disease, diabetes, depression and even potential brain damage. But what if you stopped sleeping entirely? What would your body and brain look like if you went without sleep for hours, days or even weeks? To find out more, watch the video below.