At some point, everyone experiences a sleepless night or two. While for most people, this tends to correct itself after a short time, for some, this period of sleep disruption leads to the long-term condition known as insomnia. In this article I explore what insomnia is and how common it is, and I examine some of the causes, consequences and treatments for insomnia. However, before we address insomnia, we need to know a little more about sleep and why it is important.
In humans, sleep is generally characterised by three physical signs: sitting or lying down, being quiet and having closed eyes. Although this physical inactivity has lead to the belief that sleep is a passive process, in fact period than we could possibly imagine.
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