Why We Sleep: The New Science of Sleep and Dreams
The book explains why sleep is crucial for memory, emotions, immunity and health, and warns that a chronic lack of sleep increases the risk of illness, accidents and poorer learning.
Why We Sleep by Matthew Walker is a popular science book about the role of sleep in human life and health. The author, neuroscientist and sleep researcher, explains what happens in the brain and body while we sleep and why sleep is necessary for memory, learning, emotional balance, immunity and physical recovery.
The book describes the stages of sleep, the difference between REM and non-REM sleep, and how sleep helps the brain organize information, consolidate memories, and regulate stress. Walker also warns of the consequences of lack of sleep: poorer concentration, poorer decision-making, higher risk of traffic and work accidents, and the connection to diseases such as obesity, diabetes, cardiovascular disorders and depression.
Along with scientific explanations, the book also deals with the social problem of chronic insomnia, the influence of technology, caffeine, alcohol and work rhythm on the quality of sleep. It is written in an accessible and clear manner, with the aim of showing the reader that sleep is not a luxury but a fundamental biological need and one of the most important factors in long-term health.
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