Morning person? -- It may be your body's natural alarm clock
Scientists have pinpointed hormones that trigger a 'wake-up' response in the brain
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LUBECK, Germany (CNN) -- Why do some people automatically awake in the morning while others need an alarm to drag them out of bed? Blame it on an internal body clock. German researchers have pinpointed hormones that send a signal to the brain telling it to wake up.
The hormones, adrenocorticotropin or ACTH from the pituitary gland and cortisol from the adrenal gland, send a message that alerts the brain.
According to Professor Jan Born of the University of Lubeck in Germany, this may explain why some people can wake up "on time," without an alarm clock.
Hormones ACTH and cortisol together signals the brain that it's time for the body to wake up from sleep
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Timing the end of nocturnal sleep
Jan Born, Kirsten Hansen, Lisa Marshall, Matthias Mölle and Horst L. Fehm
clipped from www.nature.com
clipped from www.nature.com
