do dreams produce same body responses as when awake?

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Offline annie123

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If one has a bad experience while awake - fright, stress etc. one produces adrenalin/ cortisol  and other chemicals. Does the body produce these in dream situations of the same type? Can/has this been measured?

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Offline evan_au

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Re: do dreams produce same body responses as when awake?
« Reply #1 on: 27/10/2012 06:08:40 »
I recall waking from nightmares with a racing heart, but I can't tell if this occurred during the dream, or was a reaction to the fright upon waking.

The following article suggests that several hormonal systems associated with physical movement are disabled during REM sleep, but implies that other hormonally-sensitive responses like heart rate and sexual function can change due to events perceived while dreaming: http://en.wikipedia.org/wiki/Rapid_eye_movement_sleep#Physiology
« Last Edit: 27/10/2012 20:52:05 by evan_au »