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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.

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The clinical syndrome of PH consists of formed, vivid, highly colored visual hallucinations and is composed of formed and often animate objects.
On the seventh day after her operation, she reported complex visual hallucinations.
Of these 55 patients, 90% experienced transient paranoid delusions, mostly directly related to drug use (such as delusions of being followed or surrounded by law-enforcement personnel or by people wanting to steal their drugs); 83% experienced auditory hallucinations, which is often consistent with paranoid delusions; 38% experienced visual hallucinations (such as people following them or looking in windows); 21% experienced tactile hallucinations (such as bugs or foreign objects on the skin); and 27% experienced transient behavioral stereotypies.
Sanchez-Ramos JR, Ortoll R, Paulson GW: Visual hallucinations associated with Parkinson's disease.
Seven were psychotic, with symptoms including auditory and visual hallucinations.
An estimated 25 to 50 percent of Alzheimer's patients may develop Alzheimer's disease psychosis (ADP), which commonly consists of disturbing visual hallucinations and delusions.
A substantial number of older adults without mental disorders but with age-related visual impairments experience formed visual hallucinations that are due to a condition known as Charles Bonnet syndrome (CBS; Teunisse et al.
A 15-year-old female presented with the acute onset of dramatic personality changes consisting of irritability, confusion, and paranoia associated with delusions and visual hallucinations progressing to a frankly catatonic state.
At the same time, dream- like auditory and visual hallucinations may occur.
A total of 63% of the DLB group experienced visual hallucinations, compared with 8% of the AD group.
The experience was created based on the descriptions of audio and visual hallucinations provided by both persons with the illness and their physicians.

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