Do blind people dream in visual images?
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Answers
Answer:
Explanation:
Yes, blind people do indeed dream in visual images. For people who were born with eyesight and then later went blind, it is not surprising that they experience visual sensations while dreaming. Dreams are drawn from memories that are stored in the brain as well as from brain circuitry that is developed while experiencing the outside world. Therefore, even though a person who lost his vision may be currently blind, his brain is still able to draw on the visual memories and on the related brain circuits that were formed before he went blind. For this reason, he can dream in visual images. What is more surprising is the discovery that people who were born blind also dream in visual images.
The human experience of vision involves three steps: (1) the transformation of a pattern of light to electrical impulses in the eyes, (2) the transmission of these electrical impulses from the eyes to the brain along the optic nerves, and (3) the decoding and assembly of these electrical impulses into visual sensations experienced in the brain. If any one of these three steps is significantly impaired, blindness results. In the vast majority of cases, blindness results from problems in the eyes and in the optic nerves, and not in the brain. In the few cases where blindness results from problems in the brain, the person usually regains some amount of vision due to brain plasticity (i.e. the ability of the brain to rewire itself). Therefore, people who are blind since birth still technically have the ability to experience visual sensations in the brain. They just have nothing sending electrical impulses with visual information to the brain. In other words, they are still capable of having visual experiences. It's just that these experiences cannot originate from the outside world. Dreams are an interesting area, because dreams do not directly originate from the outside world. Therefore, from a plausibility standpoint, it is possible for people blind since birth to dream in visual images. However, just because blind people have the neural capacity to experience visual sensations does not automatically mean that they actually do. Scientists had to carry out research studies in order to determine if people blind since birth actually do dream in visual images.
Answer:
Blind people can and do dream, though their dreams can be somewhat different from those of sighted people. .But more recent research suggests people who are blind, from birth or otherwise, can still experience visual images in their dreams.
While people blind since birth do indeed dream in visual images, they do it less often and less intensely than sighted people. Instead, they dream more often and more intensely in sounds, smells, and touch sensations. On a related note, brain scans have found that all humans dream in visual images before they are born.