Consciousness works even under anesthesia. Free Technical Library News

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Consciousness works even under anesthesia

30.07.2018

Scientists from the University of Turku in Finland conducted an experiment in which 47 absolutely healthy people took part. The subjects were put into a state of light general anesthesia with the help of two anesthetics: dexmedetomidine and propofol.

While the volunteers were unconscious, the researchers played various recordings, some of which made sense and some of which did not (for example, "The night sky was full of iridescent tomatoes").

The brains of the subjects who were injected with propofol did not distinguish between meaningful and non-meaningful speech, perceiving both types of recording as noise. And the brains of the test subjects, who were injected with dexmedetomidine, tried to "figure out" the meaning of what they heard. But after waking up, the subjects did not remember this.

58% of subjects were brought to their senses simply by raising their voice or shaking their arm aggressively. The rest of the subjects could not be brought to consciousness by such actions.

The results of the study also showed that under the influence of general anesthesia, a person first falls into a deep sleep, and then moves to another level of consciousness.

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