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    The distorted body: the perception of the relative proportions of the body is preserved in Parkinson’s disease

    Readman, M.R. and Longo, Matthew and McLatchie, N.M. and Crawford, T. J. and Linkenauger, S.A. (2022) The distorted body: the perception of the relative proportions of the body is preserved in Parkinson’s disease. Psychonomic Bulletin and Review , ISSN 1069-9384. (In Press)

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    Abstract

    Given humans’ ubiquitous visual experience of their own body, one reasonable assumption is that one’s perceptions of the lengths of their body parts should be accurate. However, recent research has shown that large systematic distortions of the length of body parts are present in healthy younger adults. These distortions appear to be linked to tactile sensitivity such that individuals overestimate the length of body parts of low tactile sensitivity to a greater extent than body parts of high tactile sensitivity. There are certain conditions featuring reduced tactile sensitivity, such as Parkinson’s Disease (PD) and healthy older ageing. However, the effect of these circumstances on individuals’ perceptions of the lengths of their body parts remains unknown. In this study, participants visually estimated the length of their body parts using their hand as a metric. We show that despite the reductions in tactile sensitivity, and potential alterations in the cortical presentation of body parts that may occur in PD and healthy older ageing, individuals with mild-moderate PD and older adults of comparable age experience body size distortions comparable to healthy younger controls. These findings demonstrate that the ability to perceive the length of one’s body parts is well preserved in mild-moderate PD.

    Metadata

    Item Type: Article
    Keyword(s) / Subject(s): Parkinson’s disease, Motor disorder, Body perception, Somatosensory
    School: School of Science > Psychological Sciences
    Depositing User: Matthew Longo
    Date Deposited: 18 May 2022 12:40
    Last Modified: 20 May 2022 05:39
    URI: https://eprints.bbk.ac.uk/id/eprint/48008

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