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HALLUCINATION, med. jur. It is a species of mania, by which "an idea reproduced by the memory is associated and embodied by the imagination." This state of mind is sometimes called delusion or waking dreams.
     2. An attempt has been made to distinguish hallucinations from illusions; the former are said to be dependent on the state of the intellectual organs and, the latter, on that of those of sense. Ray, Med. Jur. Sec. 99; 1 Beck, med. Jur. 538, note. An instance is given of a temporary hallucination in the celebrated Ben Johnson, the poet. He told a friend of his that he had spent many a night in looking at his great toe, about which he had seen Turks and Tartars, Romans and Carthagenians, fight, in his imagination. 1 Coll. on Lun. 34. If, instead of being temporary, this affection of his mind had been permanent, he would doubtless have been considered insane. See, on the subject of spectral illusions, Hibbert, Alderson and Farrar's Essays; Scott on Demonology, &c.; Bostock's Physiology, vol. 3, p. 91, 161; 1 Esquirol, Maladies Mentales, 159.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
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We decided to give them this medication [pimavanserin], which was approved by the FDA [Food and Drug Administration] 2 years ago for hallucinations and delusions for Parkinson's disease."
That's why clozapine is considered a "lifesaver" for such patients, a last-resort medication that unshackles patients with refractory psychotic symptoms from the tyranny of auditory and/or visual hallucinations and the reality distortion of fixed false beliefs such as paranoid delusions.
The Coalition Against Terrorism and Extremism (CATE) says Timi Frank, ex-deputy national publicity secretary of the All Progressives Congress (APC), is suffering from 'telltale signs of induced hallucination'.
Research suggests that the onset of visual hallucinations within five years of a dementia diagnosis is indicative of LBD, and can help clinicians accurately diagnose the condition.
Kalhovde, Elstad, and Talseth (2013) interviewed 14 people with psychotic disorders who experienced auditory hallucinations. Many participants reported that constantly hearing voices in the background made daily life more difficult.
I believe the people do not share his hallucinations.
He said, "Let me make it very clear that these hallucinations will continue especially with those people whose power has been taken away.For us, the Prime Minister the constitution is of immense importance," he added.
But how prevalent are some less common sleep problems, such as sleep paralysis and sleep hallucinations, in this group?
A Hypnagogic hallucinations are vivid dreamlike sensations that you experience as you are falling asleep.
It is not easy to communicate bad news and they are concerned that issuing a warning would alarm patients; secondly, there are no medical consultants in the condition, so there is no one to whom the patient can be referred; and thirdly, there is no specific medication to alleviate the hallucinations. Consequently, the conclusion was to say nothing.
According to researchers from Ohio State University in the US, psychedelic mushrooms evolved to contain psilocybin - the ingredient behind the hallucinations - as a way to fend off insects.
He denied any prior hallucinations and had insight that the car was not real.