the 1940s. For some reason, we decided to wear it as a badge of honour that we can get by on not enough sleep. This all adds up to a real health crisis. Most of us know that poor sleep is linked to diseases like Alzheimer's, cardiovascular disease, stroke, and diabetes. And if you go untreated with a sleep disorder, like sleep apnea, you're more likely to get many of these illnesses. But did you know about sleeps impact on your mental states? Poor sleep makes us make risky rash decisions, and is a drain on our capacity for empathy. When sleep deprivation literally makes us more sensitive to our own pain. It's not so surprising that we have a hard time. Relating to others and just generally being a good and healthy person. When we're sleep. Deprived scientists are now starting to understand how not only the quantity but also the quality of sleep impacts our health and wellbeing. My research focuses on what many scientists believe is the most regenerative stage of sleep deep sleep. We now know that generally speaking, there are three stages of sleep light sleep, rapid. I movement or Ram and deep sleep. We measure these stages by connecting electrodes to the scalp chin and chest.