Author: Zhou Simin Date: 2018-07-23
According to the US "Qiaobao Daily" reported on July 18, the US media reported that a team of doctors in Finland found that patients may never completely lose consciousness under anesthesia. The new study was published in the July issue of the British Journal of Anesthesia.
Dr. Harry Scheinin from Terveystalo Pulssi Hospital and Turku University in Finland told reporters: "The brain workload during general anesthesia is beyond our imagination." They believe that although the patient may not be completely unconscious, the brain does lose the event. The memory, that's why you think you have no consciousness after you wake up.
As part of their research, the team scanned the brains of volunteers who had been beaten with an anesthetic. In the first experiment, they swayed the volunteers in general anesthesia and shouted at them. Most patients tell doctors that they have dreamed of losing consciousness. Scheinin said that general anesthesia may be more like a state of dreams than one might have imagined.
In the second experiment, the researchers made unpleasant noises alongside their volunteers under anesthesia. Then, in his awake state, he emitted the same unpleasant noise beside him. It was found that the response of the volunteers to the noise heard under anesthesia was more responsive than the noise first heard in the awake state. This indicates that the volunteer's brain has handled these noises under anesthesia.
In another study, the researchers played a recording of the volunteers under anesthesia, with some strange words at the end of the sentence. They tested the reaction of the volunteer's brain while listening to the recording.
Scheinin said that when an individual is awake, hearing an unexpected word can cause a different reaction in peacetime. According to the brain scan of this study, the brain waveform of the volunteer showed a spike at the end of the recording, indicating that the brain is hearing and processing information, albeit unconscious.
To this end, Allan Leslie Combs, director of consciousness research at the California Center for Integrated Research, who was not involved in the study, told reporters that this is evidence that “it is difficult for people to fully enter the unconscious stateâ€. He said that a person may not completely lose consciousness, but will lose his memory of the event.
Allen also added that only mild anesthesia was used in the test, so if larger doses of anesthesia are used, the results may vary. Scheinin also said that other drugs used in surgery may also have an impact on changing real results.
Source: World Wide Web
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