What causes us to lose consciousness when we go to sleep?
In: Biology
We should distinguish between strong stimuli (e.g. speech behind the door or a bump in the bed) and weak stimuli (clock ticking).
The brain then shifts between three stages: equalizing (strong and weak stimuli is equal in perception in the brain), paradoxical phase (weak stimuli are irritating, but strong ones are pacifying), and ultra-paradoxical phase (strong impulses are now accelerating the sleep even more and only weak ones are noticeable).
At the end of the ultra-paradoxical phase, there is little to be distinguished by the perception and then the boundary is blurred.
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