Why do you often dream of falling from a height and twitching your body?

2020-11-12 | Quantum Science Theory Original |

I believe that most people dream of falling from a height or falling down suddenly for no reason when they sleep, and then their body twitches suddenly, and then wakes up, only to find that they are sleeping in bed, accompanied by a rapid heartbeat, Because I was shocked.

In addition to dreaming of waking up from falling from a height, after we fall asleep, we are also prone to not dreaming of anything, the body twitches suddenly, or we awake by stretching our arms or kicking our legs.

There is also a situation where we do not dream of falling from a height in our dreams, but dreaming of ourselves exercising. For example, I like to play badminton. I often dream of swinging a racket right after falling asleep.He wakes up involuntarily with a wave.

No matter which of these three conditions, I believe everyone has experienced it, and it often happens. This phenomenon is called falling asleep twitch, which is like a twitch, but let me tell you first, this phenomenon isA benign reaction of the human body is not a bad phenomenon, let alone a disease.

So don’t worry, don’t worry! But although this phenomenon is a benign reaction, we still have to figure out why it happened.

Sleep twitching is obvious. It often occurs in the transitional stage of the body from waking to sleep. The sleep stage that occurs is the rapid eye movement stage. Sometimes it is accompanied by dreaming and sometimes not, but the final result of the body twitching is to make yourselfSober quickly.

As for why this phenomenon occurs, it is true that scientists do not yet have a particularly accurate answer, but scientists have also proposed two hypotheses to explain this conscience reaction.

The first hypothesis is: When the motor nerve is replaced by sleep paralysis, the body will twitch

Look, when we sleep, in addition to dreams of falling from a height, we often have other dreams such as fighting, running or vigorous exercise. In our feelings, these dreams are quite real and realisticIt can be said that it is impossible to distinguish.

Although we can move arbitrarily in our dreams, the motion range is still very large, and also very violent, but our own body will not follow the dream in the brain to move, otherwise the person sleeping next to youIt may have been injured by you.

Why is this? Because when a person enters REM sleep, the motor nerves of the body have been suppressed, and the muscles of the whole body are completely relaxed, basically at the level of paralysis.

This phenomenon is called rapid eye movement sleep relaxation, to inhibit your motor nerves, so that your body can relax and rest completely, and it can also prevent you from expressing your dream behavior in reality.

We know that the brain sends electrical signals through motor nerves to trigger our body movements. For example, when we are awake, the brain can send electrical signals to our fingers through the corresponding motor nerves, allowing our muscles to contract and move the fingers.

But when we enter the state of rapid eye movement relaxation, the ability of the motor nerve to transmit signals is inhibited. Perhaps the signal transmitted is very weak and not enough to make us move.

The problem is that when we sleep, the subsystem responsible for sleep and the subsystem that controls movement and wakefulness in the brain are two completely different systems. Sometimes they compete for control of your body. In the process of contentionSome motor nerves will be accidentally excited, causing your body to twitch.

Also when you are dreaming with a strong sportiness, for example, I often dream of playing badminton because my motor nerves are always in a state of tension and excitement during the day;

When I first fell asleep, the motor nerves had not given the control of the body to the sleep system at all, and the motor nerves were still in a state of excitement. Therefore, when I dreamed that I was swinging the beat, the motor nerves were excited, and the dreamThe animals showed up in reality, and my right hand waved along with it.

There is also a situation that the brain often uses motor nerves to determine whether you are alive. When you fall asleep, motor nerves are inhibited, muscles are completely relaxed, and your body is paralyzed. At this time, the brain cannot judge your state and thinks you aredied.

It will send a signal to cause our body to twitch to judge your state. You wake up suddenly, and your brain is relieved. You are still alive, thank goodness.

Second hypothesis: We retain the stress response of the original ancestor.

We evolved from monkeys. We used to live in trees.

You want to get a monkey. They eat and drink Lazarus on the tree. During the day, the monkeys have a strong climbing ability, and there is little risk of falling from the tree.

But when they rest on a tree at night, their muscles are relaxed and the risk of falling from the tree is still quite high. Because when falling from the tree, the muscles of the whole body are the same as when they just fell asleep.Relax.

So if things go on like this, when the monkeys just fell asleep, the brains of the monkeys could not judge whether the muscles were relaxed when they fell asleep or the muscles were relaxed by falling from a tree.

So when the muscles suddenly relax during sleep, the brain will think that you have fallen from a height.

And we humans are the descendants of primates. Although our brains have evolved a lot, they still retain some patterns of the original ancestors. This is why we always dream of falling from a height for no reason, orFell and then twitched.

This is actually a protection of your brain when your body is suddenly relaxed. Moreover, the relaxation of muscles also makes our brains always produce images of falling from a height for no reason.

It seems that our ancestors often fell from trees when they slept.

This is the "Monkey Fall Hypothesis". In general, it makes sense. Our current behavior is still inextricably linked to our ancestors.

Actually, there is another characteristic left to us by our monkey ancestors in humans, which is the "grasp response" of babies.

What is said is that the hand of a newborn baby tends to have a strong grip, and whatever you give him, his little hand will grasp everything, and the grasp is very firm. This is the so-called grasp reflex.

This behavior is not autonomous consciousness, but an unconscious conditioned reflex, which is what the monkey left us.

After the monkey cub is born, he must either hold the branch firmly to avoid falling, or stick it on his mother's belly and hold his mother firmly.

This kind of grip at birth, we humans still retain it to the present.


Sleep twitch is an unconscious muscle contraction that occurs during the transition from waking to sleep. If you are under a lot of pressure all day, do a lot of strenuous exercise during the day, and your muscles are not well rested and relaxed, this will happen at nightHappening.

70% of people have had this experience, but I think it should be 100%.

Special statement

This article was uploaded and published on Baidu Know Daily from the media, the author, etc. It only represents the author's views, and does not mean that Baidu knows the views or positions of the daily, and knows that the daily only provides an information publishing platform. For cooperation and contributions, please contact zdribao@baidu.com.

+1 Like it Like

Follow the author

Quantum Science Theory
A dust with the universe in mind

Know the popular articles in daily newspapers

www.knowledge-daily.com e-mail: k@knowledge-daily.com