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Independent Aftereffects of Fat and Muscle: Implications for neural encoding, body space representation, and body image disturbance

Citation

Sturman, D and Stephen, ID and Mond, JM and Stevenson, RJ and Brooks, KR, Independent Aftereffects of Fat and Muscle: Implications for neural encoding, body space representation, and body image disturbance, Scientific Reports, 7 Article 40392. ISSN 2045-2322 (2017) [Refereed Article]


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Copyright 2017 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.1038/srep40392

Abstract

Although research addressing body size misperception has focused on socio-cognitive processes, such as internalization of the "ideal" images of bodies in the media, the perceptual basis of this phenomenon remains largely unknown. Further, most studies focus on body size per se even though this depends on both fat and muscle mass variables that have very different relationships with health. We tested visual adaptation as a mechanism for inducing body fat and muscle mass misperception, and assessed whether these two dimensions of body space are processed independently. Observers manipulated the apparent fat and muscle mass of bodies to make them appear "normal" before and after inspecting images from one of four adaptation conditions (increased fat/decreased fat/increased muscle/decreased muscle). Exposure resulted in a shift in the point of subjective normality in the direction of the adapting images along the relevant (fat or muscle) axis, suggesting that the neural mechanisms involved in body fat and muscle perception are independent. This supports the viability of adaptation as a model of realworld body size misperception, and extends its applicability to clinical manifestations of body image disturbance that entail not only preoccupation with thinness (e.g., anorexia nervosa) but also with muscularity (e.g., muscle dysmorphia).

Item Details

Item Type:Refereed Article
Keywords:Body space representation, Body image disturbance
Research Division:Medical and Health Sciences
Research Group:Public Health and Health Services
Research Field:Mental Health
Objective Division:Health
Objective Group:Public Health (excl. Specific Population Health)
Objective Field:Mental Health
Author:Mond, JM (Dr Jon Mond)
ID Code:117653
Year Published:2017
Deposited By:Centre for Rural Health
Deposited On:2017-06-22
Last Modified:2017-09-11
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