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Episode details

Radio 4,2 mins

Why do we dream?

Radio 4 in Four

Available for over a year

Dr Guy Leschziner explores the process of dreaming. Dreaming usually occurs in REM sleep (Rapid Eye Movement sleep) when our brains are very active, but our bodies are not. A switch in the brain paralyses almost all our muscles, to stop us hurting ourselves. First broadcast on the Mysteries of Sleep, 18 December 2017.

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