There is no wonder in the world. It is said that after a period of exercise, animals will be tired and need sleep. Any animal always has a certain posture when sleeping, when the body muscles are completely relaxed. But dolphins have never experienced complete muscle relaxation. Don’t dolphins sleep? According to John Riley, an American zoologist, dolphins sleep through a short interval of breathing. There will be no choking during sleep. Danger of water. After many experiments, he also found that the breathing of dolphins has a special connection with the state of their nervous system. In his work, Riley recorded the discovery. He put the dolphin on an experimental platform and injected him with a certain amount of anesthetics, up to about 30 milligrams per kilogram of body weight. Half an hour later, the depressing consequence was that the dolphin’s breathing became weaker and weaker, and finally died. Later experiments proved that dolphins should not be injected with anesthetics, or they will die.
The primary explanation for this phenomenon is that dolphins sleep consciously. Therefore, the slight influence on the nervous system of dolphins will inevitably lead to dolphin death.
The mystery of dolphin’s sleep has aroused the great interest of biologists who study the physiological function of hypnosis. They use microelectrodes to measure how dolphins sleep. The results showed that during sleep, the respiratory activity remained the same. Unlike other animals. Dolphins are still swimming when they sleep, and consciously constantly changing their swimming posture. Further studies have shown that sleeping dolphins have different brain hemispheres. When one hemisphere is sleeping, the other is waking up; every ten minutes, their activity state changes, very rhythmic. It is the alternation of sleep and awakening between the two hemispheres of dolphin brain that maintains the normal breathing. The anesthetics destroyed the normal balance of the two hemispheres of the brain, making them all in a state of sleep, thus blocking the progress of breathing.
So far, people have not really seen dolphins sleeping. But scientists are making great efforts. They firmly believe that the study of dolphin sleep will provide new enlightenment for revealing the mystery of human sleep.