Which sleep state produces dreams

Modern medical research has found that people experience two states during sleep, normal sleep and abnormal sleep. These two sleep states alternate during sleep. If your sleep is normal, 8 hours a day, then this long time is enough to repeat the sleep of the two states three or four times.

Let's talk about normal sleep first. The technical term calls this sleep without rapid eye movement, and is also known as non-rapid eye movement sleep. During this stage, the person's heart rate will be much slower than when he is awake, breathing will also slow down, blood pressure will drop, and the muscles of the whole body will begin to relax.

It's easy to understand paraphasic sleep after knowing normal sleep, which is simply referred to as 'rapid eye movement sleep', or 'dream sleep.' Compared with normal sleep, people will be more relaxed during abnormal sleep, and even the last muscle tension will decrease, and tendon reflexes will disappear. But the difference is that heart rate, breathing, and blood pressure are all elevated. The medical community believes that this phenomenon can promote human metabolism. At this time, the human body's functions are in a state of recovery, including human brain protein tissue, etc., are all preparing for the next day's energy recovery.

So what is the relationship between these two sleep states and sleep? We can carefully analyze the cycle of normal sleep and abnormal sleep.

After falling asleep, people have about 90 minutes of normal phase sleep, which is the stage of preparation for dreams, and then enter abnormal phase sleep. The initial abnormal phase sleep is only 5 to 10 minutes. Although it is so short, we can have many dreams. Next, we enter normal sleep again. The time of normal sleep is basically stable, but the time of abnormal sleep will gradually lengthen. Among several times of abnormal sleep throughout the night, the last time is the longest time we have dreamed. Up to 30 to 50 minutes.

Therefore, we often feel that sometimes we dream and sometimes we don't dream, or we feel that dreams are intermittent and unrelated. This is probably due to the alternation of normal sleep and abnormal sleep. When we wake up, we happen to be in normal sleep, so we feel like we are not dreaming. On the contrary, when we wake up, we feel like we are dreaming. Of course, this is just an explanation. There are still many mysteries waiting to be explained about the magic of dreams.

(Editor in charge:gods)