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How dolphins sleep?
On the motives of topics As sleeping giraffe?
This question did not arise by chance. The fact that all higher animals (including birds, mammals and humans) are not only required to sleep a certain part of the day, but at some point, when it is the most deep sleep, completely relax and lose mobility.
Dolphins sleep so can not: they live in the sea, but breathe air, and if deeply asleep, then lost control and drown because they can not rise to the surface to take a breath for the next inhalation.
It was decided to conduct a study of bioelectric activity of the brain, on which it seems almost certain that dolphins sleep and when awake
Until now, it was taken for granted that when sleep gives way to wakefulness and vice versa, it entails a change in the whole brain, and in the right and left hemispheres of his, who are responsible for the work of the two halves of the body. That is the case in humans, and all the animals that sleep has been studied before. But dolphins all turned out differently.
Dolphins sleep a few feet from the surface by pulling down the tail and periodically opening and closing glaza.Delo that the left and right hemispheres dolphin sleep in shifts! Such dream is about 6-7 hours per day. The second half of the brain while awake and directs the animal in the water. Half-asleep dolphin may even hunt! A newborn dolphins do not sleep the first month of life.
All cetaceans are sleeping in shallow water, at the surface of the water. Their share due to the high content of fat in the body tissue of light only slightly exceeds the proportion of water. So sleep kit goes down very slowly. From time to time the animal in a dream hits the tail and rises to the surface. Then, breathing in the air, slowly and passively immersed before the next stroke tail. The signal for the opening of the blowhole (nostril) is a whale surfacing when they sensed a change of environment. The act of breathing is very fast - in and out breath because of the special structure of the respiratory tract occur simultaneously. While staying at the blowhole water valve tightly closed.
Source:
This question did not arise by chance. The fact that all higher animals (including birds, mammals and humans) are not only required to sleep a certain part of the day, but at some point, when it is the most deep sleep, completely relax and lose mobility.
Dolphins sleep so can not: they live in the sea, but breathe air, and if deeply asleep, then lost control and drown because they can not rise to the surface to take a breath for the next inhalation.
It was decided to conduct a study of bioelectric activity of the brain, on which it seems almost certain that dolphins sleep and when awake
Until now, it was taken for granted that when sleep gives way to wakefulness and vice versa, it entails a change in the whole brain, and in the right and left hemispheres of his, who are responsible for the work of the two halves of the body. That is the case in humans, and all the animals that sleep has been studied before. But dolphins all turned out differently.
Dolphins sleep a few feet from the surface by pulling down the tail and periodically opening and closing glaza.Delo that the left and right hemispheres dolphin sleep in shifts! Such dream is about 6-7 hours per day. The second half of the brain while awake and directs the animal in the water. Half-asleep dolphin may even hunt! A newborn dolphins do not sleep the first month of life.
All cetaceans are sleeping in shallow water, at the surface of the water. Their share due to the high content of fat in the body tissue of light only slightly exceeds the proportion of water. So sleep kit goes down very slowly. From time to time the animal in a dream hits the tail and rises to the surface. Then, breathing in the air, slowly and passively immersed before the next stroke tail. The signal for the opening of the blowhole (nostril) is a whale surfacing when they sensed a change of environment. The act of breathing is very fast - in and out breath because of the special structure of the respiratory tract occur simultaneously. While staying at the blowhole water valve tightly closed.
Source:
