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J Clin Exp Neuropsychol. 2019 Feb;41(1):1-14. doi: 10.1080/13803395.2018.1483486. Epub 2018 Jun 20.

Nature of motor impairments in autism spectrum disorder: A comparison with developmental coordination disorder.

Paquet A1,2,3,4, Olliac B3,5, Golse B1,6, Vaivre-Douret L1,2,6,7,8,9.

Author information

1
a Faculty of Medicine , University of Paris Descartes , Sorbonne Paris Cité , Paris , France.
2
b CESP/Inserm U1018 , University Paris-Sud and University Paris Descartes , Paris , France.
3
c Department of Child and Adolescent Psychiatry , Esquirol Hospital , Limoges , France.
4
d Research Unit and Neurostimulation , Esquirol Hospital , Limoges , France.
5
e Inserm U1094 , Tropical Neuroepidemiology, University of Limoges , Limoges , France.
6
f Department of Child Psychiatry , Necker-Enfants Malades University Hospital , Paris , France.
7
g Department of Paediatrics, Child Development , Cochin-Port Royal University Hospitals of Paris Center , Paris , France.
8
h Endocrinology Laboratory, Imagine Institute , Necker-Enfants Malades University Hospital , Paris , France.
9
i Institut Universitaire de France (IUF) , Paris , France.

Abstract

INTRODUCTION:

Several authors have suggested the existence of motor disorders associated with developmental coordination disorder (DCD) in individuals with autism spectrum disorder (ASD). However, there are few comparative studies of psychomotor profiles that include assessments of neurological soft signs in children with ASD or DCD. We used a neuropsychomotor assessment for children with ASD from a standardized neurodevelopmental examination to understand the nature of the difficulties these children encounter. To uncover the differences and similarities in psychomotor profiles, we compared the profiles of children with ASD with those of children with DCD and focused on two recently described DCD subgroups: visuospatial-constructional (VSC) and mixed (MX).

METHODS:

We compared 18 children with ASD and 58 children with DCD (33 with VSC-DCD and 25 with MX-DCD) who were assessed with a battery of French-language tests (the NP-MOT) to evaluate the neuropsychomotor functions associated with visual perception and visual-spatial-motor structuring.

RESULTS:

Although there were similarities between the profiles of children with ASD and those with DCD (VSC-DCD or MX-DCD), these similarities were not associated with the predictive diagnostic markers that characterized subtypes of DCD. Instead, many variables (visuospatial-motor structuration, synkinetic movements, dynamic balance, manual dexterity, coordination, praxis, bodily spatial integration, and digital perception) differed among the three groups; the best performance was observed in the children with ASD.

CONCLUSION:

The neuropsychomotor profiles of children with ASD and those with VSC-DCD or MX-DCD differed, and these differences are discussed. Our results highlight that impairments of ASD are specific about lateralization disturbances and support the hypothesis of proprioceptive impairment due to visual fixation problems influenced by muscular tone in relation to the subcortical and cortical structures and possible interhemispheric disorder. Thus, some neuropsychomotor functions that underpin both gestures and a set of motor skills are affected.

KEYWORDS:

Autism spectrum disorder; developmental coordination disorder; motor impairments; neurological soft signs; psychomotor profile

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