Sometimes our nights are disrupted and sleep chopped.
For some sleepers, the scenario is always the same: they may go to bed more or less at the same time every day, with the same level of fatigue, their eyes always open at the same time during the night.
Whose fault is it?
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Why do we sometimes have the impression of falling into the void when falling asleep?
Sleep cycles
To understand what is going on in a body that wakes up every night, we must first look at our sleep cycles.
“
Each individual has their own cycle length (on average 90 minutes).
It is forged over the years and reaches a constant value in adulthood
”, explains Damien Davenne, chronobiologist and professor at the University of Caen.
As the night goes by, sleep becomes less and less deep, "
the brain gradually resumes an activity close to waking, which makes it more likely to be awakened
", informs the specialist.
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