Abstract Present in approximately 5–6% of school-aged children, developmental coordination disorder (DCD) is a neuromotor disability in which a child's motor coordination difficulties significantly ...interfere with activities of daily living or academic achievement. These children typically have difficulty with fine and/or gross motor skills, with motor performance that is usually slower, less accurate, and more variable than that of their peers. In this paper, we review the history of various definitions leading up to the current definition of DCD, prevalence estimates for the disorder, etiology, common co-morbidities, the impact of DCD on the child's life, and prognosis. As well, we briefly describe current interventions for children with the disorder and results of recent neuroimaging studies of the brains of children with DCD, including research by the authors of this paper.
•Findings extend support for the effectiveness of activity-oriented, as well as body function-oriented approaches when combined with activities.•An important new finding was the evidence of training ...effectiveness when programs were conducted in a small group format and for programs aiming at improved physical fitness.•Data suggest that active computer-assisted training can be a useful adjunct treatment, but the active ingredients are unknown.•Relatively short duration interventions still demonstrated positive treatment effects.•Comparison studies between approaches and groups (age, gender, severity, whether referred or selected and with co-occurring conditions) are needed.
As part of the process of creating an update of the clinical practice guidelines for developmental coordination disorder (DCD) (Blank, Smits-Engelsman, Polatajko, & Wilson, 2012), a systematic review of intervention studies, published since the last guidelines statement was conducted.
The aim of this study was to 1) systematically review the evidence published from January 2012 to February 2017 regarding the effectiveness of motor based interventions in individuals with DCD, 2) quantify treatment effects using a meta-analysis, 3) examine the available information on different aspects of delivery including use of group intervention, duration and frequency of therapy, and 4) identify gaps in the literature and make recommendations for future intervention research.
An electronic search of 5 databases (PubMed, Embase, Pedro, Scopus and Cochrane) was conducted for studies that evaluated motor-based interventions to improve performance for individuals with DCD.
Thirty studies covering 25 datasets were included, 19 of which provided outcomes on standardized measures of motor performance. The overall effect size (Cohen’s d) across intervention studies was large (1.06), but the range was wide: for 11 interventions, the observed effect was large (>0.80), in eight studies moderate (>0.50), and in five it was small or negligible (<0.50). Positive benefits were evident for activity-oriented approaches, body function-oriented combined with activities, active video games, and small group programs.
Results showed that activity-oriented and body function oriented interventions can have a positive effect on motor function and skills. However, given the varied methodological quality and the large confidence intervals of some studies, the results should be interpreted with caution.
With increased interest in the early diagnosis and treatment of children with autism spectrum disorders (ASD), more attention has been called to the motor skills of very young children with ASD. This ...study describes the gross and fine motor skills of a cross-sectional group of 162 children with ASD between the ages of 12 and 36 months, as well as a subset of 58 children followed longitudinally. Gross motor and fine motor age equivalent scores were obtained for all children. A ‘motor difference’ variable was calculated for each child’s gross and fine motor skills by taking the absolute difference of the children’s age equivalent motor score and their respective chronological age. In Study 1 (the cross-sectional analysis), ANCOVA (co-varied for nonverbal problem solving) revealed significant group differences in the gross motor and fine motor age difference variables. Post-hoc analysis revealed that gross motor and fine motor differences became significantly greater with each 6-month period of chronological age. In Study 2, 58 children were measured twice, an average of 12 months apart. Results indicate that the gross motor and fine motor difference scores significantly increased between the first and second measurements. The importance of addressing motor development in early intervention treatments is discussed.
Executive function is foundational for cognitive development. Previous research has shown both gross motor skills and physical activity to be related to executive function. However, evidence for ...these relationships in the preschool years, as well as in low‐ and middle‐income countries is lacking. Therefore, this study aimed to investigate the relationships between components of executive function (inhibition, shifting and working memory) and gross motor skills (locomotor skills and object control skills) in a sample of preschool children from urban and rural low‐income settings in South Africa. Results revealed that inhibition and working memory, but not shifting, were associated with gross motor skills. More specifically: inhibition was associated with both locomotor β = 0.20, p = 0.047 and object control skills β = 0.24, p = 0.024, whereas working memory was only associated with locomotor skills β = 0.21, p = 0.039. Physical activity was not associated with inhibition and shifting but was negatively associated with working memory. These results elaborate a growing evidence base linking executive function and gross motor skills in the early years, and it is the first to look at specific associations of locomotor and object control skills with executive function in the South African context (a low‐ and middle‐income country).
The first study to measure executive function in preschool children from low‐income South African settings revealed associations with gross motor skills, but not physical activity. These results elaborate a growing evidence base linking executive function and gross motor skills in the early years, and it is the first evidence from a South African context, a low‐ and middle‐income country.
This study used the Movement Assessment Battery for Children (M-ABC2) to assess motor skills in children aged 7–10 years with autism (
n
= 18) in comparison to two groups of age-matched typically ...developing children; a receptive vocabulary matched group (
n
= 19) and a nonverbal IQ matched group (
n
= 22). The results supported previous work, as indicated by a significant general motor impairment in the group with autism. However, sub-analysis of the M-ABC2 revealed that there were only 2 out of 8 subcomponent skills which showed universal significant specific deficits for the autism group; i.e. catching a ball and static balance. These results suggest that motor skill deficits associated with autism may not be pervasive but more apparent in activities demanding complex, interceptive actions or core balance ability.
In addition to the core characteristics of autism spectrum disorder (ASD), motor skill deficits are present, persistent, and pervasive across age. Although motor skill deficits have been indicated in ...young children with autism, they have not been included in the primary discussion of early intervention content. One hundred fifty-nine young children with a confirmed diagnosis of ASD (n = 110), PDD-NOS (n = 26), and non-ASD (n = 23) between the ages of 14-33 months participated in this study.1 The univariate general linear model tested the relationship of fine and gross motor skills and social communicative skills (using calibrated autism severity scores). Fine motor and gross motor skills significantly predicted calibrated autism severity (p < .05). Children with weaker motor skills have greater social communicative skill deficits. Future directions and the role of motor skills in early intervention are discussed.
The aim of this study was to validate the expanded and revised Gross Motor Function Classification System (GMFCS‐E&R) for children and youth with cerebral palsy using group consensus methods. ...Eighteen physical therapists participated in a nominal group technique to evaluate the draft version of a 12‐ to 18‐year age band. Subsequently, 30 health professionals from seven countries participated in a Delphi survey to evaluate the revised 12‐ to 18‐year and 6‐ to 12‐year age bands. Consensus was defined as agreement with a question by at least 80% of participants. After round 3 of the Delphi survey, consensus was achieved for the clarity and accuracy of the descriptions for each level and the distinctions between levels for both the 12‐ to 18‐year and 6‐ to 12‐year age bands. Participants also agreed that the distinction between capability and performance and the concept that environmental and personal factors influence methods of mobility were useful for classification of gross motor function. The results provide evidence of content validity of the GMFCS‐E&R. The GMFCS‐E&R has utility for communication, clinical decision making, databases, registries, and clinical research.
The Role of Variability in Motor Learning Dhawale, Ashesh K; Smith, Maurice A; Ölveczky, Bence P
Annual review of neuroscience,
07/2017, Volume:
40, Issue:
1
Journal Article
Peer reviewed
Open access
Trial-to-trial variability in the execution of movements and motor skills is ubiquitous and widely considered to be the unwanted consequence of a noisy nervous system. However, recent studies have ...suggested that motor variability may also be a feature of how sensorimotor systems operate and learn. This view, rooted in reinforcement learning theory, equates motor variability with purposeful exploration of motor space that, when coupled with reinforcement, can drive motor learning. Here we review studies that explore the relationship between motor variability and motor learning in both humans and animal models. We discuss neural circuit mechanisms that underlie the generation and regulation of motor variability and consider the implications that this work has for our understanding of motor learning.
Physical literacy (PL) provides a powerful lens for examining movement in relation to physical activity (PA) and motor skill outcomes, environmental context, and broader social and affective learning ...processes. To date, limited consideration has been given to the role PL plays in promoting positive health behaviours. There is no clear conceptual framework based on existing empirical evidence that links PL to health, nor has an evidence-informed case been made for such a position. The purpose of this paper is to (1) present a conceptual model positioning PL as a health determinant, and (2) present evidence in support of PL as a health determinant, drawing on research largely from outside physical education. Viewing PL from the perspective of a multidimensional, experiential convergence process enables it to be differentiated from other models. However, parallels between our model and existing models that focus on movement competence are also drawn. Arguing from a pragmatic perspective on PL, we present evidence for positioning PL as a determinant of health from two literature sources: research on motor coordination disorders in children, and associations between motor competence, PA and health in typically developing children. Statistical modelling approaches consistent with the concept of PL are discussed. Results from these approaches-confirmatory factor analysis and cluster analysis-support the idea that measures related to motor competence, motivation and positive affect work in an integrative manner to produce differences in PA and subsequent health outcomes in children. There is increasing interest in PL, particularly in the field of public health. Presenting a model that explicitly links PL to health can lead to the generation of new research questions and the possibility of broadening impact beyond the context of physical education alone. To date, there has been little conceptual attention to what positioning PL as a determinant of health means. By providing an evidence-based model of PL as a determinant of health, we hope to further the discussion and stimulate increased empirical research in the field.
Autism spectrum disorders (ASDs) are the most common pediatric diagnoses in the United States. In this perspective article, we propose that a diverse set of motor impairments are present in children ...and adults with ASDs. Specifically, we will discuss evidence related to gross motor, fine motor, postural control, and imitation/praxis impairments. Moreover, we propose that early motor delays within the first 2 years of life may contribute to the social impairments of children with ASDs; therefore, it is important to address motor impairments through timely assessments and effective interventions. Lastly, we acknowledge the limitations of the evidence currently available and suggest clinical implications for motor assessment and interventions in children with ASDs. In terms of assessment, we believe that comprehensive motor evaluations are warranted for children with ASDs and infants at risk for ASDs. In terms of interventions, there is an urgent need to develop novel embodied interventions grounded in movement and motor learning principles for children with autism.
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