In fact, it’s much more enjoyable than 6-7 hours of sleep, and when we wake up, we usually wake up. We feel as if we have slept for hours. However, despite all these positive aspects, we are faced with a problem that most of us are familiar with.

When we sleep and wake up for the second time during the day, Why do we feel like we lived yesterday before we went to sleep?

First of all, during sleep we go through 4 to 5 cycles.

In addition to these cycles, these sleep stages It is divided into rapid eye movement (REM) and non-REM sleep. These two phases are quite important compared to the others because what happens during REM is significantly different from what happens during non-REM phases.

The first three stages of sleep consist of non-REM activities. The first stage is quite short and consists of the act of falling asleep and falling asleep. Then, as we get used to sleeping our body and mind slow down. It is quite easy to wake up during this time.

During deep sleep, the body is in recovery mode and brain activity slows down.

Each sleep cycle lasts 70 to 120 minutes and the early sleep cycles of the night are longer than REM. REM sleep is usually in the second half of the night occurs.

It is very effective in sleep, brain and memory. Plays an important role in memory processing and helps the information we learn while awake to become more permanent in the brain. This process usually takes place during REM.

When we sleep and wake up for the second time during the day, we perceive the pre-sleep part as if it happened yesterday.

When we fall asleep for the second time during the day, the brain restarts the memory processing process. In this case, the events that occurred in the previous waking period Even if it’s just for a moment, it feels like it happened yesterday. can cause.

Because the brain works to make the events experienced during the day more permanent. It reworks everything that happened. Sleep also has some effects on time perception. When we wake up, we often have no idea how long we have slept.

So it becomes difficult to observe the time spent in sleep and therefore The concept of time is confused.

Furthermore, the reason for this misconception may be due to sleep inertia.

Sleep inertia, which occurs immediately after waking from a short or prolonged sleep; dizziness, drowsiness, disorientation and altered perception of time It is a feeling of cognitive impairment that can cause

Sleep inertia usually lasts 15 to 60 minutes but disappears after waking. It can last for several hours. Experts largely attribute the cause of time confusion and sleep inertia after waking to irregular sleep patterns.

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