The drawing helps you assess your stress level

The painting consists of a seemingly sliding sphere that brings different illusions, used by psychiatrists to do psychological tests.

Looking at the picture, you can see the circle moving slowly. Others said they saw images moving very quickly and had a headache when looking at them for too long.

According to Japanese neuroscience professor Yamamoto, if you see a non-moving image, your body is healthy. As the picture moves slowly, you are a little nervous and tired. If you see a continuous spinning ball, you are under stress and may have psychological problems.

Neuroscientist Dr. Alice Mado Proverbio, University of Milano-Bicocca, Italy, who posted this picture, makes sure that this is not GIF or animation."The picture is exactly a 100% static image , " said Alice.

The stress test picture was introduced by Dr. Alice Proverbio.(Photo: BBC).

According to the BBC, who specializes in researching how the human brain works, Dr. Alice explains our minds are being deceived to think that images are moving. This effect is created in the visual cortex, responsible for handling everything people see.

In the visual cortex, there are V1, V2, V3, V4 and V5. In particular, V4 is responsible for color and shape, prioritizing awareness of spiral and spherical shapes; V5 (called MT) is an area for handling motion and 3D images. This effect is triggered by the saturation of V4 neurons, which makes the speed of moving V5 neurons known as sensory signals.

"Two different images projecting the retina of each eye are a very complex interaction. Basically, it is an example of competition in the visual cortex. When a signal is weakened or inhibited For any reason, other factors can be expressed at a higher level of awareness , " said Alice.

The effect takes place inside the brain when you see the image.(Photo: BBC).

According to Dr. Alice, if you see the picture if you don't see any movement, try to look at the other eye corner or maybe because you use the screen is not big enough. The effect may also vary depending on the distance the person sees the image.

When looking at this image for too long, the circle seems to move faster, causing you a headache, dizziness. This explains why many psychologists assess stress levels through the rapid movement of the image.

Alice Mado Proverbio graduated from Experimental Psychology from the University of Rome La Sapienza, Italy. Her research has received numerous grants including the European Science Foundation, European Cognitive Psychology Association and James McDonnel Foundation for Cognitive Neuroscience .