For thousands of years, the only way to record dreams is to rely on what the dreamer could remember, and for them or another to write it down. Sometimes drawings are done to enhance the chronicle of a dream, but that is how far they could do it. Until now.
In the past few years scientists have begun experiments with various technologies to be able to record a dream with quite a bit of accuracy. We are now pushing the boundaries of science fiction and slowly turning it into science fact.
This is the science of dream recording.
What are dreams, from a biological point of view
To us, dreams are visions, images, experiences, and even sensations that our mind conjures up as we sleep. When we lucid dream, we control all of these. But from a scientific, biological point of view, dreams are caused by brain activity, and brain activity is composed of electrical signals which can be measured with machines.
Scientists have found out that the key to recording (and sometimes even predicting) dreams is to be able to match corresponding brain signals to actual tangible visuals. At the same time, figure out when to measure said signals, which as many scientists have known for a while now is during REM sleep, the stage of sleep that begins after a few hours of sleeping. However, for the initial experiments done on recording dreams, scientists have chosen to track stage 1 sleep, which is a stage that also sometimes has hallucinations and visions akin to dreams.
How is it done?
The foundation of the studies currently on-going happened in 2013, when a group of participants were tested. The participants took turns sleeping in an MRI scanner while hooked up to an EEG machine, which was used to identify what dreaming phase the participant was in. At stage 1, the subjects were woken up and asked to recall what they were dreaming about, each time measuring the brain activity patterns and associating each with every answer. This process was done over 200 times per subject until sufficient data has been gathered.
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Once general categories of what have been seen in the dreams have been organized, they recalled the same participants and showed images found online to them, this time measuring the brain activity in looking at the images, and comparing that to the previous brain activity recording taken during their sleeping stages.
This then allowed the scientists to have a database of brainwave activities and their image counterparts stored in a database. They then created a special algorithm to interpret each, and recalled the participants back to re-do the same experiment, this time, feeding the brainwave data real time to the algorithm. They woke the participants up to describe what they saw in the dream, and this time, immediately afterwards, showed them a series of images created by the algorithm using the brainwave and picture database, like a fast slideshow or an basic version of a movie.
The results were astounding. What they found out was that the machine’s interpretations of the dreams were 60% accurate, with the participants confirming the results. Although during that initial experiment, the algorithm was better in distinguishing images of different categories rather than different images from the same category, which means it could tell that the dreamer was seeing a place, or a person, or an event, but could not at that moment accurately pin point which ones specifically.
Since then, science has been advancing the dream interpretation technology forward.
What’s in store?
With advances in technology and more research, databases of brainwave activities and images can be more vast and specific, allowing more detailed and more accurate recordings of dreams. At the same time, it can be possible to artificially implant dreams via the stimulation of the brain and feeding it the corresponding brainwave signals for each image or scenario. But while it is theoretically possible to feed dreams into the brain, science has not yet figured out the biological mechanisms that allow for lucid dreaming, and unless there is a way for the dreamer to stay awake and control the dream consciously, being able to consciously affect and control the dream will continue to be in the domain of lucid dreaming.
But who knows what the future holds!
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