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Dreaming and hallucinations - Continuity or discontinuity? Perspectives from dementia with Lewy bodies

Lookup NU author(s): Daniel Collerton, Emeritus Professor Elaine Perry

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Abstract

Comparing the phenomenology, neurochemical pathology, and psychopharmacology of hallucinations and dreaming is limited by the available data. Evidence to date reveals no simple correspondence between the two states. Differences in the phenomenology of visual hallucinations and the visual component of dreams may reflect variations in visual context acting on the same underlying mechanism - the minimal visual input during dreaming contrasts with the more substantial perceived context in hallucinations. Variations in cholinergic, dopaminergic and serotonergic neurotransmitter function during sleep and during hallucinations in Lewy body dementias, together with relevant drug effects suggest that, on the whole, different, potentially opposite, changes characterise the two states. A similar analysis of other psychotic features in Lewy body dementia and other disorders suggests that, in contrast to hallucinations, there may be more convincing parallels between dreaming and delusional states. (C) 2011 Elsevier Inc. All rights reserved.

Publication metadata

Author(s): Collerton D, Perry E

Publication type: Article

Publication status: Published

Journal: Consciousness and Cognition

Year: 2011

Volume: 20

Issue: 4

Pages: 1016-1020

Print publication date: 30/04/2011

ISSN (print): 1053-8100

ISSN (electronic): 1090-2376

Publisher: Academic Press

URL: http://dx.doi.org/10.1016/j.concog.2011.03.024

DOI: 10.1016/j.concog.2011.03.024

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