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University of Pittsburgh – As aging slows body clock, a new one starts ticking

As a person ages, their circadian clock begins to slow down. But a study of nearly 150 human brains suggests that’s also when a new biological clock kicks in. A 24-hour circadian rhythm controls nearly all brain and body processes, such as the sleep/wake cycle, metabolism, alertness, and cognition. These daily activity patterns are regulated by certain genes that are …