7 research outputs found

    Autism, Joint Hypermobility-Related Disorders and Pain

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    Autism Spectrum Disorder (ASD) and Joint Hypermobility-Related Disorders are blanket terms for two etiologically and clinically heterogeneous groups of pathologies that usually appears in childhood. These conditions are seen by different medical fields, such as psychiatry in the case of ASD, and musculoskeletal disciplines and genetics in the case of hypermobility-related disorders. Thus, a link between them is rarely established in clinical setting, despite a scarce but growing body of research suggesting that both conditions co-occur more often than expected by chance. Hypermobility is a frequent sign of hereditary disorders of connective tissue (e.g., Ehlers-Danlos syndromes, Marfan syndrome), in which the main characteristic is the multisystem fragility that prone to proprioceptive and motor coordination dysfunction and hence to trauma and chronic pain. Considering the high probability that pain remains disregarded and untreated in people with ASD due to communication and methodological difficulties, increasing awareness about the interconnection between ASD and hypermobility-related disorders is relevant, since it may help identify those ASD patients susceptible to chronic pain

    Virtualia 2016. La réalité virtuelle au service de la recherche: Actes du séminaire organisé par le CIREVE à Caen (19 octobre 2016),

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    International audienceLe sĂ©minaire Virtualia est nĂ© en 2006 en mĂȘme temps que le Centre Interdisciplinaire de RĂ©alitĂ© Virtuelle (CIREVE) de l’UniversitĂ© de Caen Normandie. Son objectif est de permettre aux Ă©quipes associĂ©es au CIREVE d’exposer leurs mĂ©thodologies et les rĂ©sultats de leurs travaux dans le domaine de la RĂ©alitĂ© Virtuelle, tout en s’ouvrant Ă  des communications extĂ©rieures. Il a connu quatre Ă©ditions de 2006 Ă  2009.2016 fut l’occasion de relancer VIRTUALIA et de concrĂ©tiser le partenariat avec les UniversitĂ©s de Rouen et du Havre dans le cadre de la COMUE. Une Structure FĂ©dĂ©rative de Recherche « CIREVE » est en effet en cours de labellisation au sein de Normandie UniversitĂ©. 2016 est Ă©galement une annĂ©e importante car elle marque Ă  la fois le dixiĂšme anniversaire du CIREVE et la finalisation d’une plate-forme de rĂ©alitĂ© virtuelle normande, unique en son genre sur le territoire français. Elle est composĂ©e d’une salle immersive quatre faces de 45 m2, Ă©quipĂ©e d’un tapis roulant particuliĂšrement adaptĂ© pour l’analyse de la marche en temps rĂ©el (GRAIL de Motek Medical). Les calculateurs de cette salle immersive sont mutualisĂ©s avec un amphithĂ©Ăątre attenant de 150 places, de maniĂšre que les expĂ©rimentations effectuĂ©es avec un sujet unique dans la salle immersive puissent ĂȘtre suivies par un auditoire nombreux (besoins de formation notamment). Les Ă©quipes utilisent le matĂ©riel au fur et Ă  mesure des dĂ©veloppements informatiques et de nouveaux protocoles d’expĂ©rimentation germent dans l’esprit des chercheurs qui voient dans la rĂ©alitĂ© virtuelle des possibilitĂ©s de tests jamais atteintes.Une centaine de chercheurs utilise rĂ©guliĂšrement le plateau technique CIREVE, dans des visĂ©es de recherche qui leur sont propres. Il est toutefois apparu qu’un certain nombre de problĂ©matiques concernaient toutes les disciplines et qu’une partie de la rĂ©flexion sur les mondes virtuels pouvait ĂȘtre mutualisĂ©e. Le sĂ©minaire VIRTUALIA permet d’offrir un espace de rencontre Ă  ces chercheurs, issus d’horizons diffĂ©rents, pour discuter de l’utilisation de l’outil d’un point de vue Ă©pistĂ©mologique. Il est par exemple capital de s’interroger sur la notion de prĂ©sence. Le sujet se comporte-il de la mĂȘme façon dans l’environnement virtuel et dans le monde rĂ©el ? Les chemins de circulation choisis dans le modĂšle virtuel sont-ils les mĂȘmes que ceux qui seraient empruntĂ©s en rĂ©alitĂ© ? Les conclusions Ă©tablies dans le modĂšle virtuel sont-elles directement transposables Ă  la rĂ©alitĂ© ? Un des enjeux du travail est d’évaluer la pertinence subjective des modĂšles virtuels, ce qui est capital avant de gĂ©nĂ©raliser leur utilisation dans des actions de formation par exemple. L’utilisation d’une technologie n’est jamais complĂštement neutre. Dans le cadre des mondes virtuels, l’interaction de l’homme avec le monde de synthĂšse n’est possible qu’au travers de logiciels et d’interfaces matĂ©rielles. Il faut s’assurer que les processus cognitifs soient adĂ©quats avant de s’interroger sur le rĂ©sultat des simulations. Naturellement, le sĂ©minaire permet Ă©galement Ă  chaque discipline d’exposer les rĂ©sultats des derniĂšres recherches rĂ©alisĂ©es grĂące Ă  la rĂ©alitĂ© virtuelle.Les domaines scientifiques concernĂ©s par la rĂ©alitĂ© virtuelle sont multiples : les civilisations et les patrimoines culturels, la mĂ©decine, les neurosciences, la psychologie, les sciences du mouvement et du sport, l’ingĂ©nierie, l’informatique. L’UniversitĂ© de Caen Normandie Ă©tant pluridisciplinaire, le spectre des utilisations est trĂšs large. Elles se rĂ©partissent en trois axes principaux et un axe en Ă©mergence :LA REPRÉSENTATION : la rĂ©alitĂ© virtuelle permet de reprĂ©senter et de visualiser, interactivement et en trois dimensions, des environnements disparus, dĂ©gradĂ©s, inaccessibles, ou des environnements futurs.Domaines concernĂ©s : civilisations, patrimoine, linguistique...L'EXPÉRIMENTATION : en permettant d'interagir en temps rĂ©el avec un monde numĂ©rique 3D, la rĂ©alitĂ© virtuelle offre de nouvelles perspectives d'expĂ©rimentations dans des environnements de plus en plus proches du rĂ©el et en mĂȘme temps parfaitement contrĂŽlables.Domaines concernĂ©s : santĂ©, neuropsychologie, psychologie, activitĂ©s physiques et sportives...LA CREATION ET LE DEVELOPPEMENT D’OUTILS : les informaticiens crĂ©ent et testent des applications concernant les mĂ©thodes de navigation en monde virtuel, de restitution de la rĂ©alitĂ©.Domaine concernĂ© : informatique.LA FORMATION (axe en Ă©mergence) : par la reprĂ©sentation de la connaissance, par les diverses possibilitĂ©s d'expĂ©rimentation, la rĂ©alitĂ© virtuelle est un formidable outil de formation.Domaines concernĂ©s : sciences du langage, mĂ©decine, informatique (serious game, simulation...).Une partie importante de la rĂ©flexion dĂ©veloppĂ©e lors du sĂ©minaire Virtualia 2016 a Ă©tĂ© consacrĂ©e aux enjeux sociĂ©taux liĂ©s Ă  la rĂ©alitĂ© virtuelle : notions de mĂ©moire, d’apprentissage des gestes techniques, d’ĂȘtre humain « augmentĂ© » etc. Les articles publiĂ©s attestent du savoir-faire, bien rĂ©el cette fois, que le CIREVE a acquis en termes de crĂ©ation de mondes virtuels pour reprĂ©senter, expĂ©rimenter et former. La publication des actes du sĂ©minaire Virtualia vise Ă  mettre en lumiĂšre des recherches particuliĂšrement innovantes qui s’effectuent dans un cadre technologique exceptionnel.- S. Madeleine, Virtualia 2016. Introduction (et direction de l'Ă©dition)- J. Grieu, F. Lecroq, Th. Galinho, H. Boukachour, Environnements industriels virtualisĂ©s et processus d’apprentissage- Ph. Brunet, J. Dehut, Images 3D et humanitĂ©s numĂ©riques : modĂ©lisation et restitution du geste thĂ©Ăątral- G. Lecouvey, J. Gonneaud, N. Legrand, G. Rauchs, F. Eustache, B. Desgranges, RĂ©alitĂ© virtuelle et mĂ©moire- N. Benguigui, C. Mandil, M. Mallek, L. Lejeune, R. Thouvarecq, Étude des liens entre perception et action dans des environnements virtuels- E.-G. Dupuy, A. Maneuvrier, E. Vlamynck, S. Besnard, B. Bienvenu, L.-M. Decker, Le syndrome d’Ehlers-Danlos type hypermobile : Ă©volution des stratĂ©gies posturales en rĂ©ponse Ă  un programme de rĂ©Ă©ducation Ă  visĂ©e somesthĂ©sique- C. Weismann-Arcache, RĂ©alitĂ© virtuelle et humain augmentĂ© : subjectivation, dĂ©subjectivation ?- L. Haddouk, RĂ©alitĂ© psychique en visioconsultatio

    P30: Attentional allocation in dual-task walking: effects of hypermobile Ehlers-Danlos syndrome and cognitive demand

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    International audienceHypermobile Ehlers–Danlos syndrome (hEDS) is a connective tissue disorder characterized by proprioceptive impairments. Previously, it has been shown that hEDS patients have altered gait patterns; however,no study has investigated how hEDS patients spontaneously allocate attention during dual-task walking under varying cognitive demand. A low cognitive demand would allow patients to allocate sufficient attention to both tasks; conversely, a high cognitive demand would require them to prioritize gait control over the cognitive task performance.12 hEDS patients and 12 controls walked on a self-paced treadmill for 2 minutes during single-task and dual-task (while performing an auditory 0-back or 2-back task) in a virtual environment. Separates ANOVAs were conducted for cognitive (d-prime, reaction time) and gait (mean and standard deviation of spatio-temporal parameters, statistical persistence/anti-persistence in step speed time series) dependent variables.Patients showed lower cognitive and gait performance compared to controls. Cognitive performance further declined with a concurrent walking task in patients only. However, dual-task-related changes in gait were similar in both groups, revealing beneficial and detrimental effects under low and high cognitive demand, respectively.Gait relies more on cognitive control mechanisms in patients so that, as the demand increases, hEDS patients are more likely to prioritize gait control at the expense of cognitive performance

    P30: Attentional allocation in dual-task walking: effects of hypermobile Ehlers-Danlos syndrome and cognitive demand

    No full text
    International audienceHypermobile Ehlers–Danlos syndrome (hEDS) is a connective tissue disorder characterized by proprioceptive impairments. Previously, it has been shown that hEDS patients have altered gait patterns; however,no study has investigated how hEDS patients spontaneously allocate attention during dual-task walking under varying cognitive demand. A low cognitive demand would allow patients to allocate sufficient attention to both tasks; conversely, a high cognitive demand would require them to prioritize gait control over the cognitive task performance.12 hEDS patients and 12 controls walked on a self-paced treadmill for 2 minutes during single-task and dual-task (while performing an auditory 0-back or 2-back task) in a virtual environment. Separates ANOVAs were conducted for cognitive (d-prime, reaction time) and gait (mean and standard deviation of spatio-temporal parameters, statistical persistence/anti-persistence in step speed time series) dependent variables.Patients showed lower cognitive and gait performance compared to controls. Cognitive performance further declined with a concurrent walking task in patients only. However, dual-task-related changes in gait were similar in both groups, revealing beneficial and detrimental effects under low and high cognitive demand, respectively.Gait relies more on cognitive control mechanisms in patients so that, as the demand increases, hEDS patients are more likely to prioritize gait control at the expense of cognitive performance

    Compressive Garments in Individuals with Autism and Severe Proprioceptive Dysfunction: A Retrospective Exploratory Case Series

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    International audienceBackground: Compression garments (CGs) are an adjuvant treatment for generalized joint hypermobility (GJH), including the Ehlers-Danlos syndrome/hypermobility types. The effects of CGs are likely to be related to better proprioceptive control. We aimed to explore the use of CGs in individuals with autism and severe proprioceptive dysfunction (SPD), including individuals with GJH, to control posture and challenging behaviors.Methods: We retrospectively described 14 patients with autism and SPD, including seven with comorbid GJH, who were hospitalized for major challenging behaviors with remaining behavioral symptomatology after the implementation of multidisciplinary approaches, including medication, treatment of organic comorbidities, and behavioral restructuring. Each patient received a CG to wear for at least 1 h (but most often longer) per day for six weeks. We assessed challenging behaviors in these participants with the Aberrant Behavior Checklist (ABC), sensory integration with the Dunn questionnaire, and postural sway and motor performance using a self-designed motricity path at baseline, two weeks, and six weeks.Results: We observed a significant effect on most ABC rating scores at two weeks, which persisted at six weeks (total score, p = 0.004; irritability, p = 0.007; hyperactivity, p = 0.001; lethargy, p = 0.001). Postural control in dorsal and profile positions was significantly improved between before and after wearing the CGs (p = 0.006 and 0.007, respectively). Motor performance was also significantly improved. However, we did not observe a significant change in Dunn sensory scores. During the six-week duration, the treatment was generally well-tolerated. A comorbid GJH diagnosis was not associated with a better outcome.Conclusions: CGs appear to be a promising adjuvant treatment for both behavioral and postural impairments in individuals with autism and SPD

    Ehlers-Danlos Syndrome, Hypermobility Type: Impact of Somatosensory Orthoses on Postural Control (A Pilot Study)

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    International audienceElhers-Danlos syndrome (EDS) is the clinical manifestation of connective tissue disorders, and comprises several clinical forms with no specific symptoms and selective medical examinations which result in a delay in diagnosis of about 10 years. The EDS hypermobility type (hEDS) is characterized by generalized joint hypermobility, variable skin hyperextensibility and impaired proprioception. Since somatosensory processing and multisensory integration are crucial for both perception and action, we put forth the hypothesis that somatosensory deficits in hEDS patients may lead, among other clinical symptoms, to misperception of verticality and postural instability. Therefore, the purpose of this study was twofold: (i) to assess the impact of somatosensory deficit on subjective visual vertical (SVV) and postural stability; and (ii) to quantify the effect of wearing somatosensory orthoses (i.e., compressive garments and insoles) on postural stability. Six hEDS patients and six age- and gender-matched controls underwent a SVV (sitting, standing, lying on the right side) evaluation and a postural control evaluation on a force platform (Synapsys), with or without visual information (eyes open (EO)/eyes closed (EC)). These two latter conditions performed either without orthoses, or with compression garments (CG), or insoles, or both. Results showed that patients did not exhibit a substantial perceived tilt of the visual vertical in the direction of the body tilt (Aubert effect) as did the control subjects. Interestingly, such differential effects were only apparent when the rod was initially positioned to the left of the vertical axis (opposite the longitudinal body axis). In addition, patients showed greater postural instability (sway area) than the controls. The removal of vision exacerbated this instability, especially in the mediolateral (ML) direction. The wearing of orthoses improved postural stability, especially in the eyes-closed condition, with a particularly marked effect in the anteroposterior (AP) direction. Hence, this study suggests that hEDS is associated with changes in the relative contributions of somatosensory and vestibular inputs to verticality perception. Moreover, postural control impairment was offset, at least partially, by wearing somatosensory orthoses
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