Paranoid and misidentification subtypes of psychosis in dementia

Article


Pearce, D., Gould, R., Roughley, M., Reynolds, G., Ward, E., Bhome, R. and Reeves, S. 2022. Paranoid and misidentification subtypes of psychosis in dementia. Neuroscience & Biobehavioral Reviews. 134, pp. 1-11. https://doi.org/10.1016/j.neubiorev.2022.104529
TypeArticle
TitleParanoid and misidentification subtypes of psychosis in dementia
AuthorsPearce, D., Gould, R., Roughley, M., Reynolds, G., Ward, E., Bhome, R. and Reeves, S.
Abstract

This study aimed to review the neurobiological and neuropsychological correlates of paranoid (persecutory delusions) and misidentification (misidentification delusions and/or hallucinations) subtypes of psychosis in dementia, to establish if they represent distinct subphenotypes. Nine studies were eligible, all included patients with Alzheimer’s disease. Greater global cognitive deficits and an accelerated global cognitive decline were observed in the misidentification subtype. Neuroimaging studies showed more marked volume loss in multiple regions in patients with the misidentification subtype, including those involved in object recognition and the processing of information on spatial and temporal context. A single study found greater impairment in visual sustained attention and object recognition in the misidentification subtype. The small number of studies and methodological heterogeneity limit interpretation of the findings. Nevertheless, these findings would tentatively suggest that there may be additional or accelerated pathological change in functional networks involved in visuoperceptual processing in the misidentification subtype. This should be further explored in prospective studies and the investigation extended to other forms of dementia, to gain a transdiagnostic perspective.

KeywordsDementia; Delusions; Misidentification; Persecutory; Paranoid; Neurobiology; Neuropsychology
PublisherElsevier
JournalNeuroscience & Biobehavioral Reviews
ISSN0149-7634
Electronic1873-7528
Publication dates
Online12 Jan 2022
PrintMar 2022
Publication process dates
Deposited11 Jan 2022
Accepted09 Jan 2022
Submitted31 Mar 2021
Output statusPublished
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Open
Accepted author manuscript
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File Access Level
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Copyright Statement

© 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/

Digital Object Identifier (DOI)https://doi.org/10.1016/j.neubiorev.2022.104529
Web of Science identifierWOS:000761998400015
LanguageEnglish
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