In the third millenium BCE, Mesopotamian kings recorded and interpreted their dreams on wax tablets. A thousand years later, Ancient Egyptians wrote a dream book listing over a hundred common dreamsand their meanings. And in the years since, we haven't paud in our questto understand why we dream. So, after a great dealof scientific rearch, technological advancement, and persistence, we still don't have any definite answers,but we have some interesting theories.
We dream to fulfill our wishes. In the early 1900s, Sigmund Freud propod that while allof our dreams, including our nightmares, are a collection of imagesfrom our daily conscious lives, they also have symbolic meanings, which relate to the fulfillmentof our subconscious wishes. Freud theorized that everything we remember when we wake up from a dream is a symbolic reprentation of our unconscious primitive thoughts,urges, and desires. Freud believed that by analyzingtho remembered elements, the unconscious content would be revealedto our conscious mind, and psychological issues stemmingfrom its repression could be addresd and resolved.
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We dream to remember. To increa performance on certain mental tasks, sleep is good, but dreaming while sleeping is better. In 2010, rearchers found that subjects were much better at getting through a complex 3-D maze if they had napped and dreamedof the maze prior to their cond attempt. In fact, they were up to ten times better at it than tho who only thought of the mazewhile awake between attempts, and tho who napped but did not dreamabout the maze. Rearchers theorize that certainmemory process can happen only when we are asleep, and our dreams are a signalthat the process are taking place.
撒切尔夫人逝世We dream to forget. There are about 10,000 trillion neural connections within the architecture of your brain. They are created by everything you thinkand everything you do. A 1983 neurobiological theory of dreaming,called rever learning, holds that while sleeping,and mainly during REM sleep cycles, your neocortex reviews the neural connections and dumps the unnecessary ones. Without this unlearning process, which results in your dreams, your brain could be overrun by uless connections and parasitic thoughts could disruptthe necessary thinking you need to do while you're awake.
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回复的英文We dream to keep our brains working. The continual activation theory proposthat your dreams result from your brain's need to constantlyconsolidate and create long-term memories in order to function properly. So when external input fallsbelow a certain level, like when you're asleep, your brain automatically triggers the generation of data from its memory storages, which appear to you in the form ofthe thoughts and feelings you experience in your dreams. In other words, your dreams might bea random screen saver your brain turns on so it doesn't completely shut down.
We dream to rehear. Dreams involving dangerous and threatening situations are very common, and the primitive instinct rehearsal theory holds that the content of a dream is significant to its purpo. Whether it's an anxiety-filled night of being chad through the woods by a bear or fighting off a ninja in a dark alley, the dreams allow you to practice your fight or flight instincts and keep them sharp and depend able in ca you'll need them in real life. But it doesn't always have to be unpleasant. For instance, dreams about your attractive neighbor could actually give your reproductive instinct some practice, too.
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We dream to heal. Stress neurotransmitters in the brain are much less active during the REM stage of sleep, even during dreams of traumatic experiences, leading some rearchers to theorize that one purpo of dreaming is to takethe edge off painful experiences to allow for psychological healing. Reviewing traumatic eventsin your dreams with less mental stress may grant you a clearer perspective and enhanced ability to process them in psychologically healthy ways. People with certain mood disorders and PTSD often have difficulty sleeping, leading some scientists to believe that lack of dreaming may be a contributing factorto their illness.
我想见你 英文We dream to solve problems. Unconstrained by realityand the rules of conventional logic, in your dreams, your mind can createlimitless scenarios to help you grasp problems and formulate solutionsthat you may not consider while awake. John Steinbeck called it the committee of sleep, and rearch has demonstrated the effectiveness of dreaming on problem solving. It's also how renowned chemist August Kekule discovered the structure of the benzene molecule, and it's the reason that sometimes the best solution for a problem is to sleep on it. And tho are just a few of the moreprominent theories. As tech
nology increas our capabilityfor understanding the brain, it's possible that one day we will discover the definitive reason for them. But until that time arrives,we'll just have to keep on dreaming.
hey Vsauce Michael here and today we are going to talk about why we dream what's going on inside our brains the scientific study of dreaming is called Anaya Rolla G and for most of history it didn't really exist becau you can't hold a dream it's difficult to measure a dream you can't taste it you can't e other people's dreams and if you ask them to tell you what they dreamt the results are almost always unreliable in fact it's estimated that we forget 95% of the dreams we have especially within the first 10 minutes of having them but then in 1952 something amazing happened rearchers at the University of Chicago found this it's a unique type of electrical activity that occurs during a certain stage of a person's sleeping when rearchers awoke people during this stage they almost always reported that they had been dreaming also at the same time during this stage people's eyeballs are going crazy rapidly darting all over the place underneath their eyelids you can actually e this happening if you watch people sleep like I usually do durfon
中文转换英文>信令ing REM sleep some pretty bizarre stuff happens if you look at the electrical activity of a brain that is in REM sleep it almost exactly mimics the way the brain acts when it's awake the biggest difference being that the production of chemicals inside the brain like norepinephrine rotonin and histamine is almost completely blocked and that caus the muscles to stop moving which is why you can dream about flying or running around or fighting ninjas but your body doesn't move people who have a disorder achieving complete REM 8 topia move around in their sleep and act out their dreams they can even get out of bed and sleepwalk Oh before you move forward I should say two things one is that it's possible to wake up and not be able to move your body becau you're still in rem a topia you're completely conscious and you know that you're awake but your body is not ready to move
