У осьминогов тоже есть медленная и быстрая фазы сна

В Бразилии ученые решили изучить сон осьминогов. И добились интересных показателей. Оказывается, у этих существ тоже есть быстрая и медленная фазы сна. Прямо как у людей. Ну и не только людей, но и млекопитающих.

Предки людей и осьминогов разошлись более 500 млн лет назад. Однако нервная система достигла такого развития, когда такие фазы сна были необходимы и у одного и другого вида, рассказывают сотрудники Федерального университета Рио-Гранде до Норте в Бразилии.

У людей после погружения в сон наступает медленная фаза сна, когда организм восстанавливает силы и находится в состоянии покоя. Затем человек переходит к фазе быстрого сна. В этом случае его глаза двигаются хаотично, а мышцы напрягаются. Есть теория, что во время быстрого сна люди видят самые яркие сны.

Раньше считалось, что сны видят только люди. Но теперь доказано, что эти фазы проходят многие другие существа. В том числе и осьминоги. Это удалось выяснить во время наблюдений за этими беспозвоночными. Движение их щупалец и положение глаз во время сна указало не наличие медленной и быстрой фазы.

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