Deciphering the Optical Illusion of the Brain Do you remember this GIF of Spinning Naked Women?

A few years ago, a picture of a spinning "naked girl" was widely circulated on the Internet, saying that you could test whether your left brain is developed or your right brain is developed. If you see it rotating clockwise (from left to right) first, it means that your right brain is developed; If the first sight is counterclockwise (from right to left), it means that the left brain is developed.

I found that she can rotate clockwise (from left to right) or counterclockwise (from right to left).

So I'm not very satisfied with the result of this argument.

After a period of profound experience, I want to share my practical experience with you now. I will simply analyze it from two aspects: "the design principle of the picture itself" and "the ideology of the brain" >>& gt.

First, the design principle of the picture itself: mirror depth

1, mirror image structure: that is, taking a picture of the same person from two "opposites", the "outline" of the picture is exactly the same, but it is in a mirror image relationship.

To put it simply, a person puts on an action, and then the photographer shoots separately from the front, so the two photos can completely overlap. As shown in the figure below:

Why some people see clockwise rotation and some people see counterclockwise rotation, many people still don't know. Let's help you analyze the principle of this optical illusion.

2. Visual depth: The reason why we sometimes see clockwise rotation and sometimes counterclockwise rotation is because the rotation map itself lacks depth.

So when the brain tries to interpret the spatial depth of this map, it will take the initiative to help us fill in the depth. In brain tonic, there are two possible spatial depth tonic methods, so we may see two transformation methods.

In layman's terms: if you see a naked woman rotating clockwise, it means you are standing in front of the stage and watching; Instead, you stand behind the stage and watch.

Second, the ideology of the brain: the left and right brains complement each other.

People's left and right brains have different division of labor, but they complement each other. One should not only learn intelligent logical thinking, but also have good creative sensibility.

For example: artistic creation, although relying on the right brain. But you need your left brain to feel and observe, to discover the relationship between reasoning. Then the right brain processes abstract thinking and creates images.

All your usual feelings, that is, the first part of creation, depend on the left brain. Including reading and writing, looking at pictures, watching scenery, discovering things around you, emotional intelligence in interpersonal relationships, and reasoning on events. The right brain is creation, improvement, meditation on the fate of the world and the universe, re-creation of the known material trajectory, and imagination of the unknown.

The left brain is in charge of language, logic, writing and right limb movement, while the right brain is in charge of color, space, rhythm and left limb movement.

In the process of frequent use of language, people's left brain gets more stimulation, which makes the left brain relatively developed in the right brain.

Left-handed people are born with the dominant right brain, and the activity of the left limb exercises the right brain, making the left and right hemispheres equally developed. This situation is very conducive to promoting the development of children's brains.

However, left-handed children are more prone to accidents (including falls, cuts by sharp hard objects, injuries during sports, etc.). This is because their brain structure determines that their body coordination and balance ability is slightly poor. If they hear a sound (whether from the left or the right), they will turn their heads to the left. Therefore, they are more likely to fall when walking, cycling and skating.

Right brain (also known as artistic brain) perceptual brain

Function:

(1) is in charge of music, sound, painting, graphics, color, emotion, spatial understanding, imagination, creation, etc.

② Command the motor function of the left side of the body and the operation of the left eye, left ear, left hand and left foot.

③ The motor function of the left side and the operation of the left eye, left ear, left hand and left foot can promote the development of the right brain.

Interrelation:

① The function of the right brain is to exercise keen intuitive learning, while the left brain is rational combination and judgment;

② The right brain can provide more information to the left brain, and the left brain can make the right brain sort out the information clearly, which is beneficial to practical application;

③ The thinking of the left brain focuses on argumentation and rationalization, while the thinking of the right brain is full of originality and imagination.

The left brain (also called the wisdom brain) discusses the rational brain.

Function:

Being in charge of words, characters, symbols, analysis, calculation, understanding, reasoning and judgment is the focus of our reading, calculation and composition.

② Command the motor functions of the right side of the body, such as the operation of the right eye, right ear, right hand and right foot.

③ The motor function of the right half and the operation of the right eye, right ear, right hand and right foot can promote the development of the left brain.

Are lefties necessarily smart?

The answer is not entirely. ...

They only use their left and right limbs at the same time, which is forgotten by most people. It is more stimulating to the right hemisphere, so they are more flexible than right-handed people. But if they can't continue to develop and utilize it the day after tomorrow, the result will be no use!

After understanding the above basic knowledge, let's go on to understand the mapping principle of brain to image rotation. & gt& gt

Most people look clockwise (or counterclockwise) at first;

When told that the picture is two-way and consciously "wants to look counterclockwise", quite a few people can finally see counterclockwise, but once they see counterclockwise, most people can't turn clockwise for a long time;

Among those who see two directions, a small number of people often see different directions later, but subjectively they can't control them effectively;

Among those who often change direction, a few people can master some "skills" so as to control the direction of rotation;

Among those who can control the direction, a few people can express their skills and successfully teach others to master their skills.

I can stabilize the frequency of direction switching in less than half a turn, that is, I change direction every 45 degrees. Once, in order to test how much I can control, I spent a lot of time on high-concentration training control, and then I made the picture shake once in the process (that is, it was close to static), but it was not static, but the swing range was very small, just like the feeling that we suddenly got stuck watching a movie, but the time was very limited, only less than 60.

Because it takes a lot of brains and the success rate is limited, you can't do it every time. Just know that you can do it without trying again and again.

Although I have only done it once, and the time is short, I have already had a great sense of accomplishment. ...

Next, I want to discuss why this graph is bidirectional and how their relationship with the left and right brains is established.

First of all, I want to say that under normal perspective, this picture is not two-way, and the real rotation direction of naked women should be counterclockwise (some people think it is clockwise, I am afraid that only those who really make pictures have the right to judge). The reason is the rotation direction of the shadow. If you notice the reflection of the naked woman, you will find that the trajectory of the toes in the reflection is an ellipse. Under the normal visual angle, this ellipse is the trajectory produced by the circular motion of the toes under the visual error of near and far. The upper part of the ellipse is the trajectory when the toes are far away from the observer, and the lower part is the trajectory when the toes are close to the observer. The lower part of the ellipse in the picture is hidden, and in the upper part, the movement direction of toe reflection is counterclockwise, so the rotation direction of naked woman is counterclockwise.

Of course, under this observation, we can still imagine the upper part of the ellipse as a part close to us, but this imagination does not conform to the normal perspective. Because in such a spatial perspective, the picture should not present a bright background of "brighter in the middle and darker around".

But I found that if you only look at your legs, it will be easy to change your direction (in fact, many people focus on their legs to change their direction); But when I look at the whole person, I see that counterclockwise is slower. So I think, in fact, counterclockwise and clockwise images are not exactly the same. At the same time, I also think that the part of the naked woman itself is a clockwise rotation image, which leads most people to see clockwise rotation at first sight.

Then, why do you say that the right brain sees things clockwise and the left brain sees things counterclockwise? That's what I used to understand. Because the right brain is good at observation and spatial imagination, when we don't pay attention to the direction of the shadow, the right brain will be keenly aware of the subtle difference between clockwise and counterclockwise in the image, thus outputting the signal of clockwise rotation. After noticing the direction of the shadow, the left brain draws a conclusion through reasoning that clockwise is impossible. At this time, the right brain needs to synthesize the shadow and human image and build a model of counterclockwise rotation in the brain. At this point, you can see that it is counterclockwise. The reason why we can't switch freely is because the brain has a famous persistent suggestion effect on visual signals. In order to overcome this effect, a trick is to blink when you want to switch directions, which will help to weaken this suggestive effect.

Finally, summarize some skills so that everyone can see the rotation in two directions smoothly:

1, if your visual focus is on the background of the picture, you will feel the naked woman rotating clockwise; If the visual focus is on the toes raised by the naked woman, you will feel the naked woman rotating counterclockwise;

2. If your visual focus is on the naked woman, you will feel the naked woman rotating clockwise; If the visual focus is on the supporting feet of the naked woman, you will feel the naked woman rotating counterclockwise;

3. If your visual focus is on other things, first imagine the rotation direction of the naked woman with your brain. When you shift your visual focus to the naked woman again, the desired rotation direction will appear;

4. If your visual focus is on the periphery of the picture, you can see the rotation in different directions by looking at the naked woman from the visual corner; If you deliberately imagine the rotation direction of the naked woman at this time, the naked woman will show the rotation direction you want.

5. If your visual focus is on the left side of the naked woman, you can make the naked woman rotate clockwise; If the visual focus is on the right side of the naked woman, you can rotate the naked woman counterclockwise.

After the actual test of these methods, I now think that the rotation direction of naked women has little to do with the left and right brains, or even nothing. Because I can focus on any hemisphere, and then I can see the rotation in different directions. Therefore, the human brain potential is infinite. As long as you are willing, you can control your ideology at will through training, and then ideology reacts on the brain and strengthens its function.

Now it's your turn. Did you see the "naked girl" rotating clockwise? Or counterclockwise? It is said that clockwise, there are more women than men. Is it up to everyone? ...

By the way, add a knowledge point here: this picture is a three-dimensional picture without depth. The real original author is 1995, a Flash expert Kayahara Nobuyuki who graduated from the Economics Department of Hiroshima University in Japan. In addition, the picture is not called "Yale dancer", but the original name of the picture is "Sihouette illusion", which means "silhouette illusion".

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