Tag Archives | Hallucination

Is the world real, or is it just an illusion or hallucination?


Marina Galperina writes at Hopes&Fears:

Is this real life? How do we know that we are not hallucinating it all? What if we’re plugged into a Matrix-style virtual reality simulator? Isn’t the universe a giant hologram anyway? Is reality really real? What is reality?

We asked renowned neuroscientists, physicists, psychologists, technology theorists and hallucinogen researchers if we can ever tell whether the “reality” we are experiencing is “real” or not. Don’t worry. You’re going to be ok.

Jessica L. Nielson, Ph.D. Department of Neurosurgery, Postdoctoral Scholar, University of California, San Francisco (UCSF), Brain and Spinal Injury Center (BASIC)

What is our metric for determining what is real? That is probably different for each person. One could try and find a consensus state that most people would agree is “real” or a “hallucination” but from the recent literature using imaging techniques in people who are having a hallucinatory experience on psychedelics, it seems the brain is hyper-connected and perhaps just letting in more of the perceivable spectrum of reality.

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The disturbing consequences of seeing your doppelganger

What happens when you meet your doppelganger face-to-face? For one young man, it meant jumping out of a four story window to reconcile his place in reality. It happened when he stopped taking his anticonvulsant medication and got out of bed one morning only to see himself still lying there.

Anil Ananthaswamy via BBC:

The incident seemed to have been started when the young man had stopped taking some of his anticonvulsant medication. One morning, instead of going to work, he drank copious amounts of beer and stayed in bed. But it turned out to be a harrowing lie-in.

He felt dizzy, stood up, turned around, and saw himself still lying in bed. He was aware that the person in bed was him, and was not willing to get up and would thus make himself late for work. Furious at the prone self, the man shouted at it, shook it, and even jumped on it, all to no avail.

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Computer Hallucinations: Large Scale Deep Neural Net


Recently, Disinfo ran an article about how Google set up feedback loops to its image recognition software and created some very interesting “dream”-like effects. Yeah, Google. “Dream.” You can view a gallery of their images here.

Some other software engineers, among whom is Jonas Degrave, a Belgian PhD student, who are not nearly as concerned with euphemism, have created an “LSD neural net,” which is similar in concept to Google’s feedback loops. Except they actually made a channel on Twitch that shows the algorithmic permutations in real time video, constantly zooming in like a fractal. Remarkably, the viewers in the video chat can type in two objects, for example “tent + gondola,” and the algorithm randomly choose one entry and morph using images of these objects. It is really quite interesting.

If you’re some kind of freak that actually knows how this stuff works, feel free to check out the write up giving background on how the engineers technically created this piece on Jonas Degrave’s site.… Read the rest

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Alien Abductions: Facts and Origin

Noliv O (CC by-nd 2.0)

Noliv O (CC by-nd 2.0)

via Live Science:

Hundreds of thousands or millions of Americans believe they have been abducted by aliens. In a typical case, an abductee recounts lying in bed one night when an eerie feeling overcomes him, and alien beings appear out of nowhere. The extraterrestrials transport him to a spacecraft and subject him to a battery of physical and psychological tests. After what seems like hours, he is returned to his bedroom unharmed, and finds that the whole ordeal transpired in minutes.

Abductees think their traumatic experiences were real. However, most psychologists think abductions are lucid dreams or hallucinations, triggered by an awareness of other people’s similar experiences. One recent experiment, in which participants trained in lucid dreaming techniques were able to dream up vivid alien encounters, supports this hypothesis. But if each perceived abduction is just the latest in a series of hallucinations, what was it that triggered that first dream or delusion?

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Oliver Sacks, Exploring How Hallucinations Happen

via NPR 9780307947437_custom-f54744401dadf5676ee07efe7e3a5f96294231c9-s2

In Oliver Sacks‘ book The Mind’s Eye, the neurologist included an interesting footnote in a chapter about losing vision in one eye because of cancer that said: “In the ’60s, during a period of experimenting with large doses of amphetamines, I experienced a different sort of vivid mental imagery.”

He expands on this footnote in his book, Hallucinations, where he writes about various types of hallucinations — visions triggered by grief, brain injury, migraines, medications and neurological disorders.

One chapter of the book — that’s out in paperback July 2 — deals with altered states and Sacks’ personal experimentation with hallucinogenic and mind-altering drugs in the ’60s. He says the first time he tried marijuana, it induced fascinating perceptual distortion. He was looking at his hand, and it appeared to be retreating from him, yet getting larger and larger.

“I was fascinated that one could have such perceptual changes, and also that they went with a certain feeling of significance, an almost numinous feeling.

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