hallucination

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Related to visual hallucination: schizophrenia
See: figment, insanity, phantom

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.

References in periodicals archive ?
If isolated visual hallucinations manifest independently or before the onset of "classical" PD psychosis, which is defined as lasting for over 1 month, it has been described as mostly resulting from medication [56].
Visual hallucinations and macular degeneration: an example of the Charles Bonnet syndrome.
The onset of visual hallucinations relative to the estimated onset of dementia was 1.7 years in the DLB group and 6 years in the AD group, making it "an absolute discriminator," she said in response to a question from a meeting attendee.
The analysis of the thematic content of visual hallucinations showed similar pattern with men and high social class visualizing mental or real images of people, whereas, women and low social class seeing either spirits or demons.
Taylor et al., "Neuronal loss and A-synuclein pathology in the superior colliculus and its relationship to visual hallucinations in dementia with Lewy bodies," The American Journal of Geriatric Psychiatry, vol.
In a small 2018 study (Journal of Clinical Psychiatry, May-June), 35 percent of participants reported these, along with visual hallucinations. Auditory hallucinations tended to be more common in older people, women, people with hearing impairment, and those taking antipsychotic medications.
Visual hallucinations are commonly associated with delirium, intoxication, and neurologic illness
These symptoms are salient in the early stage of DLB, and they are manifested as delusions, visual hallucinations, REM sleep behavior disorder, and depression [1, 3].
The patient reported auditory and visual hallucinations and was observed to be internally preoccupied.
However, this is the first reported case of visual hallucinations occurring exclusively with eye closure secondary to hyponatremia.
After the study the users reported visual hallucinations which were similar to those brought on by psilocybin, the active ingredient in magic mushrooms.
I start interviewing him and then stop because he is displaying symptoms of MDD, has a depressed mood, says he does not feel rested when he awakens, has poor concentration and memory, is becoming more and more socially isolated, and is experiencing auditory and visual hallucinations that are yelling at him to kill himself.

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