Is virtual reality effective in improving the motor performance of children with developmental coordination disorder? A systematic review.

INTRODUCTION: Although virtual reality (VR) is an increasingly popular approach within studies that propose interventions for children with developmental coordination disorder (DCD), evidence on the effectiveness of VR remains debatable. The aim of this study was to synthesize evidence on the effectiveness of VR interventions for motor performance improvement in children with DCD. EVIDENCE ACQUISITION: Searches were conducted in the MEDLINE/PubMed, Scopus, Web of Science and ERIC databases to select studies published from 1 January 2006 to 30 November 2017. Two independent reviewers performed the primary study selection based on titles, abstracts and full-text reading; this selection included randomized controlled trials (RCTs) that applied VR interventions to children with DCD and assessed outcomes related to motor performance. The methodological quality of the studies included in the search was assessed through the PEDro scale. PRISMA guidelines and Cochrane recommendations for systematic reviews were followed. The effect size of each intervention was calculated to allow for the interpretation of clinical effects, and the body of evidence was synthesised through the GRADE approach. EVIDENCE SYNTHESIS: A total of 2160 publications were retrieved; by the end of the selection process, twelve RCTs had been included. Of these twelve, seven were classified as having high methodological quality. Only three studies satisfied the homogeneity conditions to be assessed through the GRADE system, which showed a low level of evidence in favor of VR for improving the motor performance of children with DCD. CONCLUSIONS: Not enough evidence currently exists to support or refute the use of VR over non-VR interventions for improving motor performance in children with DCD. Despite the potential for improving the motor performance of DCD children, the absence of specific protocols prevents formal recommendations of VR for these children. Future studies should consider VR protocols that are more specific regarding the tasks, features and target motor skills to be developed by DCD children. In addition, comparisons of similar groups at baseline, the concealment of allocation and the blinding of assessors are internal validity aspects which deserve researchers' attention.

Linear and Nonlinear Analyses of the Cardiac Autonomic Control in Children With Developmental Coordination Disorder: A Case-Control Study.

Children with Developmental Coordination Disorder (DCD) and children at risk for DCD (r-DCD) present motor impairments interfering in their school, leisure and daily activities. In addition, these children may have abnormalities in their cardiac autonomic control, which together with their motor impairments, restrict their health and functionality. Therefore, this study aimed to assess the cardiac autonomic control, by linear and nonlinear analysis, at supine and during an orthostatic stimulus in DCD, r-DCD and typically developed children. Thirteen DCD children (11 boys and 2 girls, aged 8.08 ± 0.79 years), 19 children at risk for DCD (13 boys and 6 girls, aged 8.10 ± 0.96 years) and 18 typically developed children, who constituted the control group (CG) (10 boys and 8 girls, aged 8.50 ± 0.96 years) underwent a heart rate variability (HRV) examination. R-R intervals were recorded in order to assess the cardiac autonomic control using a validated HR monitor. HRV was analyzed by linear and nonlinear methods and compared between r-DCD, DCD, and CG. The DCD group presented blunted cardiac autonomic adjustment to the orthostatic stimulus, which was not observed in r-DCD and CG. Regarding nonlinear analysis of HRV, the DCD group presented lower parasympathetic modulation in the supine position compared to the r-DCD and CG groups. In the within group analysis, only the DCD group did not increase HR from supine to standing posture. Symbolic analysis revealed a significant decrease in 2LV (p < 0.0001) and 2UV (p < 0.0001) indices from supine to orthostatic posture only in the CG. In conclusion, r-DCD and DCD children present cardiac autonomic dysfunction characterized by higher sympathetic, lower parasympathetic and lower complexity of cardiac autonomic control in the supine position, as well as a blunted autonomic adjustment to the orthostatic stimulus. Therefore, cardiovascular health improvement should be part of DCD children's management, even in cases of less severe motor impairment.