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Motor planning and control in autism. A kinematic analysis of preschool children / I.R.C.C.S. “EUGENIO MEDEA” in Research in Autism Spectrum Disorders, 5-2 (April-June 2011)
[article]
Titre : Motor planning and control in autism. A kinematic analysis of preschool children Type de document : Texte imprimé et/ou numérique Auteurs : I.R.C.C.S. “EUGENIO MEDEA”, Auteur Année de publication : 2011 Article en page(s) : p.834-842 Langues : Anglais (eng) Mots-clés : Autism Movement Motor planning Motor control Index. décimale : PER Périodiques Résumé : Kinematic recordings in a reach and drop task were compared between 12 preschool children with autism without mental retardation and 12 gender and age-matched normally developing children. Our aim was to investigate whether motor anomalies in autism may depend more on a planning ability dysfunction or on a motor control deficit. Planning and control processes were separately investigated by examining kinematic recordings divided into primary movement- (planning-based) and corrective submovement- (control-based) phases.
Despite longer movement durations, participants with autism were as accurate in their movements as normally developing children were and showed a preserved movement structure. No differences were observed for the initial movement phases for hand velocity, accuracy and inter-trial variability.
Our main finding was that of a group difference in proximity of the target, at transition from planning-based to control-based movement guidance. At primary movement conclusion, the normally developing children had already reduced velocity and begun orienting their hands for ball drop. Also, they tended to terminate movements within the same movement unit that had transported the hand into the target box. Compared to this group, participants with autism reached this stage with less preparation: their speed was significantly higher, wrist inclination reduced and they showed further movement units after entering the box over the vast majority of trials. These additional movement units were presumed to represent late control-based spatial adjustments. Hence, our data support the hypothesis that children with autism have a greater need for corrective submovements.
We provide evidence that motor anomalies in autism might be determined either by a disruption in planning-control integration, or by a limited planning process capacity, as participants with autism might have been able to plan only the very beginning of the movement, leaving its final phases to further planning on the fly, with important consequences on movement time optimization.En ligne : http://dx.doi.org/10.1016/j.rasd.2010.09.013 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=114
in Research in Autism Spectrum Disorders > 5-2 (April-June 2011) . - p.834-842[article] Motor planning and control in autism. A kinematic analysis of preschool children [Texte imprimé et/ou numérique] / I.R.C.C.S. “EUGENIO MEDEA”, Auteur . - 2011 . - p.834-842.
Langues : Anglais (eng)
in Research in Autism Spectrum Disorders > 5-2 (April-June 2011) . - p.834-842
Mots-clés : Autism Movement Motor planning Motor control Index. décimale : PER Périodiques Résumé : Kinematic recordings in a reach and drop task were compared between 12 preschool children with autism without mental retardation and 12 gender and age-matched normally developing children. Our aim was to investigate whether motor anomalies in autism may depend more on a planning ability dysfunction or on a motor control deficit. Planning and control processes were separately investigated by examining kinematic recordings divided into primary movement- (planning-based) and corrective submovement- (control-based) phases.
Despite longer movement durations, participants with autism were as accurate in their movements as normally developing children were and showed a preserved movement structure. No differences were observed for the initial movement phases for hand velocity, accuracy and inter-trial variability.
Our main finding was that of a group difference in proximity of the target, at transition from planning-based to control-based movement guidance. At primary movement conclusion, the normally developing children had already reduced velocity and begun orienting their hands for ball drop. Also, they tended to terminate movements within the same movement unit that had transported the hand into the target box. Compared to this group, participants with autism reached this stage with less preparation: their speed was significantly higher, wrist inclination reduced and they showed further movement units after entering the box over the vast majority of trials. These additional movement units were presumed to represent late control-based spatial adjustments. Hence, our data support the hypothesis that children with autism have a greater need for corrective submovements.
We provide evidence that motor anomalies in autism might be determined either by a disruption in planning-control integration, or by a limited planning process capacity, as participants with autism might have been able to plan only the very beginning of the movement, leaving its final phases to further planning on the fly, with important consequences on movement time optimization.En ligne : http://dx.doi.org/10.1016/j.rasd.2010.09.013 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=114 Preliminary Evidence for Inflexibility of Motor Planning in Children with Autism Spectrum Disorder / Breanna E. STUDENKA in Autism - Open Access, 7-2 ([01/03/2017])
[article]
Titre : Preliminary Evidence for Inflexibility of Motor Planning in Children with Autism Spectrum Disorder Type de document : Texte imprimé et/ou numérique Auteurs : Breanna E. STUDENKA, Auteur ; Daisha L. CUMMINS, Auteur Article en page(s) : 6 p. Langues : Anglais (eng) Mots-clés : Motor planning Hysteresis Autism spectrum disorder Action costs End-state comfort Repetitive behavior Index. décimale : PER Périodiques Résumé : Background: Children with ASD often exhibit repetitive and stereotyped behaviors as well as difficulty performing motor actions. Difficulty in performing actions may stem from resistance to formulating new motor plans (persisting with previous motor plans even when new plans are needed for efficient movement). The aim of this study was to document flexibility of motor planning in individuals with ASD. Method: Five children with ASD and 5 neurotypical control children performed a grasp-and-place motor task. In successive trials, a wooden rod was placed in one of 24 different orientations – rotating either clockwise or counter clockwise around a circular template. A child grasped the rod and moved it. The position where the child switched from thumb-toward one end of the rod to the other in each direction was recorded. Results: Neurotypical children exhibited earlier grasp switches as well as a greater number of grasp switches as compared to children with ASD. Conclusion: We found preliminary evidence that, for children with ASD, changing a grasp was more costly than being uncomfortable. En ligne : https://dx.doi.org/10.4172/2165-7890.1000208 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=410
in Autism - Open Access > 7-2 [01/03/2017] . - 6 p.[article] Preliminary Evidence for Inflexibility of Motor Planning in Children with Autism Spectrum Disorder [Texte imprimé et/ou numérique] / Breanna E. STUDENKA, Auteur ; Daisha L. CUMMINS, Auteur . - 6 p.
Langues : Anglais (eng)
in Autism - Open Access > 7-2 [01/03/2017] . - 6 p.
Mots-clés : Motor planning Hysteresis Autism spectrum disorder Action costs End-state comfort Repetitive behavior Index. décimale : PER Périodiques Résumé : Background: Children with ASD often exhibit repetitive and stereotyped behaviors as well as difficulty performing motor actions. Difficulty in performing actions may stem from resistance to formulating new motor plans (persisting with previous motor plans even when new plans are needed for efficient movement). The aim of this study was to document flexibility of motor planning in individuals with ASD. Method: Five children with ASD and 5 neurotypical control children performed a grasp-and-place motor task. In successive trials, a wooden rod was placed in one of 24 different orientations – rotating either clockwise or counter clockwise around a circular template. A child grasped the rod and moved it. The position where the child switched from thumb-toward one end of the rod to the other in each direction was recorded. Results: Neurotypical children exhibited earlier grasp switches as well as a greater number of grasp switches as compared to children with ASD. Conclusion: We found preliminary evidence that, for children with ASD, changing a grasp was more costly than being uncomfortable. En ligne : https://dx.doi.org/10.4172/2165-7890.1000208 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=410 Dyspraxia in ASD: Impaired coordination of movement elements / Danielle MCAULIFFE in Autism Research, 10-4 (April 2017)
[article]
Titre : Dyspraxia in ASD: Impaired coordination of movement elements Type de document : Texte imprimé et/ou numérique Auteurs : Danielle MCAULIFFE, Auteur ; Ajay S. PILLAI, Auteur ; Alyssa TIEDEMANN, Auteur ; Stewart H. MOSTOFSKY, Auteur ; Joshua B. EWEN, Auteur Article en page(s) : p.648-652 Langues : Anglais (eng) Mots-clés : dyspraxia autism motor planning divided attention multiple task interference Index. décimale : PER Périodiques Résumé : Children with autism spectrum disorders (ASD) have long been known to have deficits in the performance of praxis gestures; these motor deficits also correlate with social and communicative deficits. To date, the precise nature of the errors involved in praxis has not been clearly mapped out. Based on observations of individuals with ASD performing gestures, we hypothesized that the simultaneous execution of multiple movement elements is especially impaired in affected children. We examined 25 school-aged participants with ASD and 25 age-matched controls performing seven simultaneous gestures that required the concurrent performance of movement elements and nine serial gestures, in which all elements were performed serially. There was indeed a group × gesture-type interaction (P?0.001). Whereas both groups had greater difficulty performing simultaneous than serial gestures, children with ASD had a 2.6-times greater performance decrement with simultaneous (vs. serial) gestures than controls. These results point to a potential deficit in the simultaneous processing of multiple inputs and outputs in ASD. Such deficits could relate to models of social interaction that highlight the parallel-processing nature of social communication. En ligne : http://dx.doi.org/10.1002/aur.1693 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=307
in Autism Research > 10-4 (April 2017) . - p.648-652[article] Dyspraxia in ASD: Impaired coordination of movement elements [Texte imprimé et/ou numérique] / Danielle MCAULIFFE, Auteur ; Ajay S. PILLAI, Auteur ; Alyssa TIEDEMANN, Auteur ; Stewart H. MOSTOFSKY, Auteur ; Joshua B. EWEN, Auteur . - p.648-652.
Langues : Anglais (eng)
in Autism Research > 10-4 (April 2017) . - p.648-652
Mots-clés : dyspraxia autism motor planning divided attention multiple task interference Index. décimale : PER Périodiques Résumé : Children with autism spectrum disorders (ASD) have long been known to have deficits in the performance of praxis gestures; these motor deficits also correlate with social and communicative deficits. To date, the precise nature of the errors involved in praxis has not been clearly mapped out. Based on observations of individuals with ASD performing gestures, we hypothesized that the simultaneous execution of multiple movement elements is especially impaired in affected children. We examined 25 school-aged participants with ASD and 25 age-matched controls performing seven simultaneous gestures that required the concurrent performance of movement elements and nine serial gestures, in which all elements were performed serially. There was indeed a group × gesture-type interaction (P?0.001). Whereas both groups had greater difficulty performing simultaneous than serial gestures, children with ASD had a 2.6-times greater performance decrement with simultaneous (vs. serial) gestures than controls. These results point to a potential deficit in the simultaneous processing of multiple inputs and outputs in ASD. Such deficits could relate to models of social interaction that highlight the parallel-processing nature of social communication. En ligne : http://dx.doi.org/10.1002/aur.1693 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=307