Wish Fulfillment? No. But Dreams (and Sleep) Have Meaning

Dreams may not be the secret window into the frustrated desires of the unconscious that Sigmund Freud first posited in 1899, but growing evidence suggests that dreams — and, more so, sleep — are powerfully connected to the processing of human emotion. According to new research presented last week at the annual meeting of the Associated Professional Sleep Societies in Seattle, adequate sleep may underpin our ability to understand complex emotions properly in waking life. “Sleep essentially is resetting the magnetic north of your emotional compass,” says Matthew Walker, director of the Sleep and Neuroimaging Lab at the University of California, Berkeley.

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How Much Sleep Do You Really Need?

Sleep is one of the richest topics in science today: why we need it, why it can be hard to get, and how that affects everything from our athletic performance to our income. Daniel Kripke, co-director of research at the Scripps Clinic Sleep Center in La Jolla, Calif., has looked at the most important question of all. In 2002, he compared death rates among more than 1 million American adults who, as part of a study on cancer prevention, reported their average nightly amount of sleep.

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