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

Readman, Megan and McLatchie, Neil and Crawford, Trevor and Longo, Matthew and Linkenauger, Sally (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

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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.

Item Type:
Journal Article
Journal or Publication Title:
Psychonomic Bulletin and Review
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3200/3205
Subjects:
ID Code:
169199
Deposited By:
Deposited On:
22 Apr 2022 08:30
Refereed?:
Yes
Published?:
Published
Last Modified:
04 May 2022 02:55