Imagining one's own and someone else's body actions: dissociation in anorexia nervosa.

<h4>Background</h4>Patients with anorexia nervosa (AN) usually report feeling larger than they really are. This body overestimation appears to be related not only to the patient's body image but also to an abnormal representation of the body in action. In previous work on a body-sca...

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Autores principales:	Dewi Guardia, Léa Conversy, Renaud Jardri, Gilles Lafargue, Pierre Thomas, Vincent Dodin, Olivier Cottencin, Marion Luyat
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0b1bcb456c5645bebb143dc81f0a026a
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spelling	oai:doaj.org-article:0b1bcb456c5645bebb143dc81f0a026a2021-11-18T07:07:54ZImagining one's own and someone else's body actions: dissociation in anorexia nervosa.1932-620310.1371/journal.pone.0043241https://doaj.org/article/0b1bcb456c5645bebb143dc81f0a026a2012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22937025/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>Patients with anorexia nervosa (AN) usually report feeling larger than they really are. This body overestimation appears to be related not only to the patient's body image but also to an abnormal representation of the body in action. In previous work on a body-scaled anticipation task, anorexic patients judged that they could not pass through a door-like aperture even when it was easily wide enough--suggesting the involvement of the body schema. In the present study, we sought to establish whether this erroneous judgment about action is specifically observed when it concerns one's own body or whether it is symptomatic of a general impairment in perceptual discrimination.<h4>Methods</h4>Twenty-five anorexic participants and 25 control participants were presented with a door-like aperture. They had to judge whether or not the aperture was wide enough for them to pass through (i.e. first-person perspective, 1PP) and for another person present in the testing room to pass through (i.e. third-person perspective, 3PP).<h4>Results</h4>We observed a higher passability ratio (i.e. the critical aperture size to shoulder width ratio) in AN patients for 1PP but not for 3PP. Moreover, the magnitude of the passability ratio was positively correlated not only with the extent of the patient's body and eating concerns but also with the body weight prior to disease onset. Our results suggest that body overestimation can affect judgments about the capacity for action but only when they concern the patient's own body. This could be related to impairments of the overall network involved in the emergence of the body schema and in one's own perspective judgments.<h4>Conclusion</h4>Overestimation of the body schema might occur because the central nervous system has not updated the new, emaciated body, with maintenance of an incorrect representation based on the patient's pre-AN body dimensions.Dewi GuardiaLéa ConversyRenaud JardriGilles LafarguePierre ThomasVincent DodinOlivier CottencinMarion LuyatPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 8, p e43241 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Dewi Guardia Léa Conversy Renaud Jardri Gilles Lafargue Pierre Thomas Vincent Dodin Olivier Cottencin Marion Luyat Imagining one's own and someone else's body actions: dissociation in anorexia nervosa.
description	<h4>Background</h4>Patients with anorexia nervosa (AN) usually report feeling larger than they really are. This body overestimation appears to be related not only to the patient's body image but also to an abnormal representation of the body in action. In previous work on a body-scaled anticipation task, anorexic patients judged that they could not pass through a door-like aperture even when it was easily wide enough--suggesting the involvement of the body schema. In the present study, we sought to establish whether this erroneous judgment about action is specifically observed when it concerns one's own body or whether it is symptomatic of a general impairment in perceptual discrimination.<h4>Methods</h4>Twenty-five anorexic participants and 25 control participants were presented with a door-like aperture. They had to judge whether or not the aperture was wide enough for them to pass through (i.e. first-person perspective, 1PP) and for another person present in the testing room to pass through (i.e. third-person perspective, 3PP).<h4>Results</h4>We observed a higher passability ratio (i.e. the critical aperture size to shoulder width ratio) in AN patients for 1PP but not for 3PP. Moreover, the magnitude of the passability ratio was positively correlated not only with the extent of the patient's body and eating concerns but also with the body weight prior to disease onset. Our results suggest that body overestimation can affect judgments about the capacity for action but only when they concern the patient's own body. This could be related to impairments of the overall network involved in the emergence of the body schema and in one's own perspective judgments.<h4>Conclusion</h4>Overestimation of the body schema might occur because the central nervous system has not updated the new, emaciated body, with maintenance of an incorrect representation based on the patient's pre-AN body dimensions.
format	article
author	Dewi Guardia Léa Conversy Renaud Jardri Gilles Lafargue Pierre Thomas Vincent Dodin Olivier Cottencin Marion Luyat
author_facet	Dewi Guardia Léa Conversy Renaud Jardri Gilles Lafargue Pierre Thomas Vincent Dodin Olivier Cottencin Marion Luyat
author_sort	Dewi Guardia
title	Imagining one's own and someone else's body actions: dissociation in anorexia nervosa.
title_short	Imagining one's own and someone else's body actions: dissociation in anorexia nervosa.
title_full	Imagining one's own and someone else's body actions: dissociation in anorexia nervosa.
title_fullStr	Imagining one's own and someone else's body actions: dissociation in anorexia nervosa.
title_full_unstemmed	Imagining one's own and someone else's body actions: dissociation in anorexia nervosa.
title_sort	imagining one's own and someone else's body actions: dissociation in anorexia nervosa.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/0b1bcb456c5645bebb143dc81f0a026a
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Imagining one's own and someone else's body actions: dissociation in anorexia nervosa.

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