A UCLA technique makes the brain see things that don't exist.

<pre>A UCLA technique makes the brain see things that don't exist.

Caltech developed two opto-acoustic illusions that demonstrate the retroactive nature of the brain. We see not what we have, but thought-out details that logically fit into the big picture – this is called postdication. And it turns out that it can be controlled.

In the first experiment, three beeps were heard with an interval of 58 milliseconds, and when the first was applied, the lamp on the left also came on, and on the third, the lamp on the right. In the center there was no light bulb, but when the unit was turned on again, the experimental people said that they saw the light in the center. However, if the beep was turned off, the subjects saw only two real light bulbs. The third, non-existent central, appears in the imagination precisely as compensation for disorder – once there are three sounds, there must be three lights.

A similar retroactive mechanism manifested itself in the second experiment called the Invisible Rabbit, which differed from the first by the replacement of signals. Now there were three lights turned on, but the sound for only two of them – and again the brain stubbornly wanted to notice three sources of light and three sources of sound. Scientists have proven that sound affects vision, neural signal processing, and the brain's subconscious perception of a picture.

However, everything deteriorated, it was worth starting to increase the intervals between signals. Scientists had a lot of discussions, trying to establish a boundary that separates conscious thinking from acting on reflexes. Some claimed that the brain began to work actively within 80 milliseconds after receiving the signal, others stretched the period to 500 milliseconds. The fact is that after half a second of observation, the brain is already guaranteed to respond to an extra signal, like an error or a hoax. But where is the line beyond which the mind simply does not have time to work – remains to be seen.

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