Sleep from being underrated, is now being overrated.
Yet we still do not really know why we sleep.
Over the past decades, we have learned much about the genes, molecules, cells, and circuits involved in sleep and its regulation. We may not be aware of it, but our brains are highly active while we sleep. Because sleep is so common in humans and in the animal world, we take it for granted and do not ask the obvious question: What might be its physiological purpose? The simplistic answer-that our bodies and nervous systems need to rest-can be dismissed. It benefits our brains and mental well-being, and even other entities such as our cardiovascular and immune systems. Sleep is an important and non-negotiable bodily function that is essential for human health. The myth of the strong, successful individual who can get by with minimal time in bed or who skimps on sleep to get more done has by now been thoroughly debunked. Recently, we have seen a shift toward the appreciation of a good night’s sleep. Modern society has long underrated sleep. We are not only inactive but also vulnerable. Every night we lie down, close our eyes, and lose consciousness for several hours.
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