Title :

Painfully thin but locked inside a fatter body: abnormalities in both anticipation and execution of action in anorexia nervosa

Author(s) :

Metral, Morgane [Auteur]
Laboratoire de Psychologie et NeuroCognition [LPNC]
Guardia, Dewi [Auteur]
Laboratoire de Neurosciences Fonctionnelles et Pathologies [LNFP]
Bauwens, Ines [Auteur]
Centre Hospitalier Régional Universitaire [CHU Lille] [CHRU Lille]
Guerraz, Michel [Auteur]
Laboratoire de Psychologie et NeuroCognition [LPNC]
Lafargue, Gilles [Auteur]
Laboratoire de Neurosciences Fonctionnelles et Pathologies [LNFP]
Cottencin, Olivier [Auteur]
Laboratoire de Neurosciences Fonctionnelles et Pathologies [LNFP]
Luyat, Marion [Auteur]
Psychologie : Interactions, Temps, Emotions, Cognition (PSITEC) - ULR 4072 [PSITEC]

Journal title :

BMC research notes

Volume number :

7

Pages :

707

Publication date :

2014

HAL domain(s) :

Sciences cognitives

English abstract : [en]

BACKGROUND People with anorexia nervosa (AN) usually report feeling broader than they really are. The objective of the present study was to better understand the body schema's involvement in this false self-representation ...
Show more >BACKGROUND People with anorexia nervosa (AN) usually report feeling broader than they really are. The objective of the present study was to better understand the body schema's involvement in this false self-representation in AN. We tested the potential for correction of the body schema impairment via the sensorimotor feedback provided by a real, executed action and relative to an imagined action. We also took account of the impact of the AN patients' weight variations on the task outcomes. METHODS Fourteen inpatient participants with AN and fourteen control participants were presented with a doorway-like aperture. The participants had to (i) judge whether or not various apertures were wide enough for them to pass through in a motor imagery task and then (ii) actually perform the action by passing through various apertures. RESULTS We observed a higher passability ratio (i.e. the ratio between the critical aperture size and shoulder width) in participants with AN (relative to controls) for both motor imagery and real action. Moreover, the magnitude of the passability ratio was positively correlated with weight recovery. CONCLUSION The body schema alteration in AN appears to be strong enough to affect the patient's actions. Furthermore, the alteration resists correction by the sensorimotor feedback generated during action. This bias is linked to weight variations. The central nervous system might be locked to a false representation of the body that cannot be updated. Moreover, these results prompt us to suggest that emotional burden during weight recovery could also alter sensorimotor aspects of body representation. New therapeutic methods should take account of body schema alterations in AN as adjuncts to psychotherapy.Show less >

Language :

Anglais

Audience :

Non spécifiée

Popular science :

Non

Administrative institution(s) :

CHU Lille
CNRS
Université de Lille

Collections :

• Psychologie : Interactions, Temps, Émotions, Cognition (PSITEC) - ULR 4072
• Sciences Cognitives et Sciences Affectives (SCALab) - UMR 9193

Research team(s) :

Neuropsychologie & Audition

Submission date :

2020-09-14T10:33:18Z
2021-01-25T10:58:45Z
2021-03-15T09:02:28Z