(Medical Xpress) -- Psychedelic substances have long been used for healing, ceremonial, or mind-altering subjective experiences due to compounds that, when ingested or inhaled, generate hallucinations, perceptual distortions, ...
Mystical near-death experiences where people report a range of spiritual and physical symptoms, including out-of-body sensations, seeing or hearing hallucinations, racing thoughts and time distortion, affect around 10 per ...
Jun 29, 2019
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(Medical Xpress)—Italian psychologist Giovanni Caputo has conducted a study with human volunteers where it was revealed that when two people stare into one another's eyes for a long period of time, both can experience disassociation ...
A woman with an "iPod in her head" has helped scientists at Newcastle University and University College London identify the areas of the brain that are affected when patients experience a rare condition called musical hallucinations.
Jan 28, 2014
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(Medical Xpress)—Perhaps the most controversial book ever written in the field of psychology, was Julian Janes' mid-seventies classic, "The Origin of Consciousness in the Breakdown of the Bicameral Mind." In it, Jaynes ...
Researchers at Columbia University Irving Medical Center (CUIMC) and New York State Psychiatric Institute (NYSPI) found that people with schizophrenia who experience auditory hallucinations tend to hear what they expect, ...
Feb 16, 2018
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Scientists at The Scripps Research Institute have discovered that DNA stays too tightly wound in certain brain cells of schizophrenic subjects.
Dec 28, 2011
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Scientists have developed artificial intelligence software that can create proteins that may be useful as vaccines, cancer treatments, or even tools for pulling carbon pollution out of the air.
Jul 21, 2022
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A new method for inducing, modelling and measuring visual hallucinations in healthy individuals suggests these complex experiences share a common underlying mechanism with normal visual perception, UNSW researchers say.
Oct 12, 2016
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For the past several decades, psychedelics have been widely stigmatized as dangerous illegal drugs. But a recent surge of academic research into their use to treat psychiatric conditions is spurring a recent shift in public ...
Mar 17, 2022
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A hallucination, in the broadest sense, is a perception in the absence of a stimulus. In a stricter sense, hallucinations are defined as perceptions in a conscious and awake state in the absence of external stimuli which have qualities of real perception, in that they are vivid, substantial, and located in external objective space. The latter definition distinguishes hallucinations from the related phenomena of dreaming, which does not involve wakefulness; illusion, which involves distorted or misinterpreted real perception; imagery, which does not mimic real perception and is under voluntary control; and pseudohallucination, which does not mimic real perception, but is not under voluntary control. Hallucinations also differ from "delusional perceptions", in which a correctly sensed and interpreted genuine perception is given some additional (and typically bizarre) significance.
Hallucinations can occur in any sensory modality — visual, auditory, olfactory, gustatory, tactile, proprioceptive, equilibrioceptive, nociceptive, and thermoceptive.
A mild form of hallucination is known as a disturbance, and can occur in any of the senses above. These may be things like seeing movement in peripheral vision, or hearing faint noises and voices.
Hypnagogic hallucinations and hypnopompic hallucinations are considered normal phenomena. Hypnagogic hallucinations can occur as one is falling asleep and hypnopompic hallucinations occur when one is waking up.
Hallucinations can also be associated with drug or alcohol use (particularly deliriants), sleep deprivation, psychosis, neurological disorders, and delirium tremens.
This text uses material from Wikipedia, licensed under CC BY-SA
