How images are produced in dreams without any light?
609606
light is needed for viewing objects, but not for virtual ones. see our dreams are a interaction of waves produced in the brain. when there is interaction in the mind there is no need of light in that.
431247
During sleep a part of the brain called the pons fires randomly. The cortex of your brain then tries to make sense of these random signals by pairing them with things in your memory. If you spend all day listening to dark music and thinking about death, you would then dream about it. It means nothing. Analyzing the latent content of dreams is nonsense that went out of favour with scientists a long time ago. \nFreud also believed nonsense like "all women suffer from penis envy." Freud is highly quotable, but unreliable.
1072338
Yes they can.\nThey dream of sounds and feelings and smells they grew up with, but no one's for sure if they can see anything. Some experts just believe that all they see is nothing since they don't know what things look like.\n\nMy mom works with sleep research and she has told me that blind people during sleep have the same brain stimuli that regular people have when they are dreaming.
146733
My guess is that this person would learn to experience life without vision at all, and thus would dream sounds, tactile sensations, etc. but would see very few visions in their dreams at all beyond those they would see during the course of a day (most blind people are not 100% sightless).
11019
That's actually an interesting question.\n\nOneriology, the scientific study of dreams, has revealed much about these mysterious experiences full of imagery.\n\nOne theory of dreams (the activation synthesis theory) states that dreams are the brain's attempt to interpret random impulses from the brain region known as the pons (which produces REM sleep). "Memory, attention and the other features lacking in a dream state depend on the lack of norepinephrine and serotonin, producing a psychotic state, as well as a lack of orientation to time, place and person."\n\nIf we could accurately measure these random impulses and the brain's reaction to them, we might be able to construct a probablistic (or, though unlikely, a deterministic) model of dreaming. This may vary greatly among individuals, though. If we could do that, along with being able convert the imagery into a visual format (definitely not trivial), we might be able to record our dreams.
286151
well, just think about it. we often dream because of things that we see or experience in our lives. A blind person would most likely dream about things they experience in their lives. But since they cannot see these things, they must imagine what they would look like. therefore, they probably dream about what they think things are like. They would dream about what they picture in their mind when they experience something. Although, im not an expert, but that's just my theory.
292598
"...research by Mark Solms suggests that dreams are generated in the forebrain, and that REM sleep and dreaming are not directly related. [2]\n\nCombining Hobson's activation synthesis hypothesis with Holms's findings, the continual-activation theory of dreaming presented by Jie Zhang proposes that dreaming is a result of brain activation and synthesis, and at the same time, dreaming and REM sleep are controlled by different brain mechanisms. The theory is developed through a series of hypotheses. By introducing a temporary memory stage into the memory process, Zhang first proposed that the memory formed during waking time is not saved directly into the long-term memory; instead it is saved into a temporary memory store. He, then, divides brain into two subsidiary systems: the conscious brain and the non-conscious brain. Zhang hypothesizes that the function of sleep is to process, encode and transfer the data from the temporary memory to the long-term memory. NREM sleep processes the conscious related memory (declarative memory); and REM sleep processes the non-conscious related memory (procedural memory). He further hypothesizes that both conscious and non-conscious subsidiary systems of brain have to be continually activated through their life times. When the level of activation of either subsidiary system descends to a given threshold, a continual-activation mechanism will be triggered to maintain brain continual activation. Zhang assumes that during REM sleep, the non-conscious part of brain is busy to process the procedural memory; in the meanwhile, the level of activation in the conscious part of brain will descend to a very low level as the inputs from the sensory are basically disconnected. This will trigger the continual-activation mechanism to generate a data stream from the memory stores to flow through the conscious part of brain. Zhang suggests that this pulse-like brain activation is the inducer of each dream. He proposes that, with the involvement of brain associative thinking system, dreaming is, thereafter, self maintained with dreamer's own thinking until the next pulse of memory insertion. This explains why dreams have both characteristics of continuity (within a dream) and sudden scene changes (between two dreams). [3][4]..."
519560
Dreams are images from your subconscious mind. You are getting images of things that you may have seen in the past or things that are on your mind, but not in the concious part that makes you remember things all the time. The reasons for forgetting dreams are interferance, salience and repression. I will not try to explain these look at the link I have included.
4648
I can think of objects in terms of touch, and often do.  And sometimes I dream in scripts, "hearing" the dream as if someone were narrating a movie or even reading from a book.\n\nDreams start out as emotional responses that are translated into the mind's personal symbology.  So if you dream of fear, that may manifest as seeing a gorge as if from a high bridge, or just feeling like someone with a knife has grabbed you.\n\nIf you pay attention to your dreams you may realize that you "see" things that you couldn't possibly see, like someone behind you.
1090016
I think I dream in color. Researchers agree that most dreams are in color. Because dreams fades so quickly after we are awake, our memories of the dream are often recalled in gray tones. Studies show that those who are in tune with color in waking life tend to remember more color in dreams.\n\nTry the following exercise:\nDuring the day, notice at least once an hour the color of something, anything. My guess is that you will start recalling more color in your dreams.
1083220
It depends on what kind of blindness they have.  If they are born blind because of a problem with the areas of the brain that control sight, they will not have any sort of visual images in their dreams. Their brain cannot make the images if those areas are damaged.\n\nIf they are born blind because of a problem with thier eye or visual nerve, they may get "flashes" from the visual areas of the brain when random activity fires across them during sleep. But, they won't know what it is, and very little is remembered from most dreaming, anyway. They may even perceive, in their dream, that the "flash" is from a different sense that they DO have images and vocabulary for (sound, touch, taste, smell). They won't have any memories to pull on of real visual images. So even though they may "see" because of dream activity in that area of the brain, it isn't a "real" experience in thier dream.\n\nSomeone who was born with sight, and loses their vision later, WILL have dreams with visual images, because they have the memory to pull on, and images attached to language so that they can understand and remember.
577826
One of my students is doing his research project on this issue, and though I have not read the paper yet, as he is not finished, I have talked with him and consulted his early sources.  He has found some interesting preliminary results.  \n\nIt seems that Sigmeund Freud, a Viennese doctor in the late 18th century studied dreams of his psychiatric patients, and through this research, he decided dreams could be interpreted as our subconscious minds' desires.  The implications for the Victorians of that era were great because overall Freud's theory of man's essential nature was that he is a selfish being whose basic motivations for life are about fulfilling those selfish needs and desires.  \n\nYet, much research has been done since that era.  A Dr. Karl(?) Jung, another later psychiatrist, has revamped Freud's original research, and even as late as the late 1980's, new research has connected dreams to chemical reactions in the brain occurring in the neurons along which all the electical impulses of the brain run, like electric circuitry, and this research says they are just random electrical discharges that have no meaning, like shadows of memories carried by the impulses, bits and pieces of images generated by earlier thoughts.  Yet, for me, this still leaves open the question.  Even if dreams are shadows of thoughts, one must ask if shadows of bits and pieces of memory would be purposeful for we humans.  I mean, why would our minds generate the shadow?  I think that is just as powerful a question as:  Why do our brains produce the chemical reactions carrying images of memories anyway?\n\nI think it is easy to see that there is much work to do yet in discovering the real essence of dreams before one can decide if there are more than random meanings to be taken from them.  And, that is basically what I am hearing from this student about his struggle with the research process so far.\n\nHope this is helpful.\n\nCC Ryder
587284
Black & white.\ncolourful dreams only very rarely.
356657
Dreams are created through our subconscious when you sleep,playing back images from events that you may have experienced or visibly witnessed.It is also believed that we have the abilaty to control our dreams (DREAMSCAPE).So it is pssible to decide what you will dream even before you sleep because the thought is planted in the subconscious before you close your eyes.Try it you might be supprised.
147833
It is a very important dream. Blue in this case is symbolic of serenity. The white light is pure. It definitely means something, but I'm not sure. It's something for you to figure out. Like, who did you see if you can remember. Don't think about your dream too much, but if you have more, write them down. Maybe the message will be more clear then. I'll write more if I can think of anything else.
723280
They do not and cannot "see in their dreams."  People who have been blind a long time, and who get some kind of operation that permits vision, do not "see" either - because "seeing" requires a very great deal of learning by the brain to processes visual input into accurate spatial/motive relationships.\n\nSuddenly having the visual ability restored is upsetting to blind people.  Not only does it frighten them because they cannot interpret things correctly, but it disturbs their sense of self and their sense of how they relate and fit into the world, which has always been for them a question of sound and touch.
887530
I was an insomniac (and sometimes still am) and once a 'sleep doctor' told me this:\n\nWhen light enters your eyes, it stimulates the brain, and tells the body that it is awake. Your brain has to work to process the picture in front of you, even if you've been staring at it for hours. So, with the light stimulation, or even in total darkness where you can't see anything, if your eyes are open, your brain is attempting to process whatever image is, or is not there. Therefore, if your eyes are open and blinking, your brain is working. To sleep, your body needs to be at rest - including your brain. So, when the brain feels that it needs to rest, it forces the body to shut its eyes so that the brain only has to concentrate on the basest forms of work, such as breathing and keeping your heart beating (both of which coincidentally slow during sleep), and will be able to rest due to the greatly decreased amount of work it has to do. As long as your eyes are open, you are thinking too much for it to be able to rest.\n\nI hope that helps. ^_^