“Taste of temperature” or the illusion of salty ice
Taste buds can also be deceived by temperature. All you need to do is warm or cool your tongue. For example, research has shown that some people are able to taste salty or sour in their mouth if they place an ice cube on certain areas of the tongue, whereas warming the tongue will produce a sweet sensation.
Temperature often also affects the intensity of the aroma. Scientists have come to the conclusion that some taste sensations are enhanced by drinking heated or cooled liquid. The bitter taste is much more pronounced in combination with a cool liquid, while sourness and astringency, which causes dryness in the mouth, are felt stronger and last longer under the influence of a warm one. As for the sensation of sweetness, unlike other tastes, it does not depend on the temperature of the liquid.
Is seasickness an illusion?
There is still no consensus on why we feel sick when we get seasick. This feeling arises as a result of discrepancies between the information received by our eyes, inner ear and nerve endings of different organs. For example, it is much easier for the inner ear to detect our movement compared to other organs.
However, why all this leads to nausea and vomiting is still unclear. The current theory draws attention to the similarity between bouts of seasickness and the symptoms we experience when eating something spoiled, poisoned or poisonous. If the brain receives counterintuitive information about a change in such a stable concept as gravity, the organ sending such signals is considered faulty. “The algorithm will look like this: if, in your opinion, the value of gravity deviates from the norm, then you have been poisoned, and you should immediately get rid of the remaining poison,” explains Canadian-American scientist, specialist in experimental psychology and cognitive sciences Stephen Pinker.
Thus, the deceived stomach throws up everything you just ate. But not every specialist shares this point of view; after all, drugs that are effective in combating nausea that accompanies food poisoning do not always help with an attack of seasickness.
Visual illusions or optical illusions. Classification.
Visual hallucinations include: the appearance of halos around objects, visual movement, the formation of streaks of light, long-term unclear afterimages, flashes of bright light, visual snow and a whole list of symptoms that should be detected by a doctor.
Physiological illusions of optical illusion are associated with the work of the senses (illusions of the appearance of color, shine or movement, which do not exist in reality. Physiological illusions also include images that remain on the retina of the eye after we look at a bright light (light bulb or candle, For example).
Hermann illusion
Hermann illusion
At the intersections of the white stripes, small gray spots are visible, although in fact there are no spots. This illusion was discovered by Ludimar Hermann in 1870. The Herman illusion can be explained by the fact that the light and shadow receptors of the eye compete and suppress each other. Therefore, when the eye slides from a dark to a light area, we see gray spots.
Blind spot. The cat was drawn by Albert Dubois
Visual illusions. Blind spot
Close your right eye and look at the drawn cat from a distance of 20-30 cm. Look at the cat’s nose and slowly move the drawing (you will have to print it out first) back and forth until the fly disappears. The disappearance of the fly is explained by a blind spot on the retina. The blind spot is an area not sensitive to light where receptors from nerve fibers gather in the optic nerve.
Binocular rivalry
Binocular rivalry
Look at the red-green grid shown. After a while, you will see only green bars instead of a grid, and then only red ones. This phenomenon was discovered by B. Breeze in 1899. The illusion of optical illusion, discovered by B. Breeze, is explained by the fact that when there are two stimuli (in our case, green and red), one of them begins to dominate, and the other is suppressed.
Cafe wall illusion
Illusion cafe wall
At first glance, the red lines between the rectangles appear to be slanted and curved, although in fact they are parallel. The illusion was discovered by R. Gregory in Bristol at the Wall Cafe. The optical illusion of the café wall is that parallel lines intersected by many short diagonal segments appear to diverge.
Retinal rivalry
Visual illusions or optical illusions. Retinal rivalry
Touch the tip of your nose to the white triangle while looking at the colored circles. The two circles will merge into one. It will seem that the colors are mixed, although in fact you alternately perceive one color and then the other. Such illusions of optical illusion arise due to the competition of fiber - alternate perception of different stimuli by each eye.
In order for the experiment to be successful, the size of the entire image should be approximately 10x10 cm.
Illusion of movement
Visual illusions or optical illusions: movement, rotation, flickering, shining
At the intersections of the white stripes, small gray spots are visible, although in fact there are no spots. This illusion was discovered by Ludimar Hermann in 1870. The Herman illusion can be explained by the fact that the light and shadow receptors of the eye compete and suppress each other. Therefore, when the eye slides from a dark to a light area, we see gray spots.
Illusion of movement
Illusion of movement
Rotation illusion
Rotation illusion
Rotation illusion
Illusion of radiance
