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A hallucination is a perception in the absence of an external stimulus that has the compelling sense of reality. [6] They are distinguishable from several related phenomena, such as dreaming (), which does not involve wakefulness; pseudohallucination, which does not mimic real perception, and is accurately perceived as unreal; illusion, which involves distorted or misinterpreted real ...
It is difficult to attribute particular symptoms to the mirrored-self misidentification delusion rather than to a separate feature of the patient's general dementia. [19] As such, hypnosis of healthy patients is typically used to study the delusion because it can highlight the symptoms of the delusion while removing the influence of other ...
Lewy body dementia is caused by protein deposits developing in the brain’s nerve cells, which can result in delusions and visual hallucinations. Vascular dementia and paranoia are linked as well ...
A delusion [a] is a fixed belief that is not amenable to change in light of conflicting evidence. [2] As a pathology, it is distinct from a belief based on false or incomplete information, confabulation, dogma, illusion, hallucination, or some other misleading effects of perception, as individuals with those beliefs are able to change or readjust their beliefs upon reviewing the evidence.
Peduncular hallucinosis (PH) is a rare neurological disorder that causes vivid visual hallucinations that typically occur in dark environments and last for several minutes. . Unlike some other kinds of hallucinations, the hallucinations that patients with PH experience are very realistic, and often involve people and environments that are familiar to the affected individua
Capgras and Reboul-Lachaux first called the syndrome "l'illusion des sosies", which can be translated literally as "the illusion of Doppelgänger." [ 14 ] The syndrome was initially considered a purely psychiatric disorder, the delusion of a double seen as symptomatic of schizophrenia , and purely a female disorder (though this is now known not ...
Delusional disorder, traditionally synonymous with paranoia, is a mental illness in which a person has delusions, but with no accompanying prominent hallucinations, thought disorder, mood disorder, or significant flattening of affect. [7] [8] Delusions are a specific symptom of psychosis.
In rare instances, it can include delusions of immortality. [9] Syndrome of delusional companions is the belief that objects (such as soft toys) are sentient beings. [10] Clonal pluralization of the self, where a person believes there are multiple copies of themselves, identical both physically and psychologically, but physically separate and ...
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