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Smits-Engelsman B, Denysschen M, Lust J, Coetzee D, Valtr L, Schoemaker M, Verbecque E. Which outcomes are key to the pre-intervention assessment profile of a child with developmental coordination disorder? A systematic review and meta-analysis. Biomed J 2024:100768. [PMID: 39032866 DOI: 10.1016/j.bj.2024.100768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 06/26/2024] [Accepted: 07/11/2024] [Indexed: 07/23/2024] Open
Abstract
BACKGROUND Purpose of this study was to determine what key aspects of function should be incorporated to make up a pre-intervention assessment profile of a child with Developmental Coordination Disorder (DCD); more specifically, what aspects of functioning are implicated in DCD and what is their relative impact? METHODS A systematic review and meta-analysis were conducted, for which Pubmed, Web of Science, Scopus and Proquest were searched (last update: April 2023, PROSPERO: CRD42023461619). Case-control studies were included to determine point estimates for performances on field-based tests in different domains of functioning. Risk of bias was assessed, and level of evidence estimated. Random-effect meta-analyses were performed to calculate the pooled standardized mean differences for domains of functioning and subgrouping was done for clinically relevant subdomains. Heterogeneity was determined with I2. RESULTS 121 papers were included for analyses. Data of 5 923 children with DCD were included (59.8% boys) and 23 619 Typically Developing (TD) children (45.8% boys). The mean (SD) age of the DCD group was 10.3y (1.2) and 9.3y (1.3) for the TD children. Moderate evidence was found for motor performance, executive functions, sensory processing and perceptions, cognitive functions and sports and leisure activities to be affected in children with DCD. CONCLUSION Differences between the two groups varied per domain of functioning. This emphasizes the diversity present within children with DCD and provides a rationale for explaining the heterogeneity in this patient group. Yet, results highlight the potential involvement of all these domains and call for clinicians to be alert not only to examine motor skill difficulties but also other aspects of function. Results indicate the need to develop an individualized pre-intervention multi-dimensional assessment profile for each child with DCD. It also supports the important role that clinicians play in an interdisciplinary team to tackle the difficulties encountered by children with DCD.
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Affiliation(s)
- Bouwien Smits-Engelsman
- Physical Activity, Sport and Recreation, (PhASRec, focus area, Faculty Health Sciences, North-West University, Potchefstroom, South Africa; Department of Health and Rehabilitation Sciences, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.
| | - Marisja Denysschen
- Physical Activity, Sport and Recreation, (PhASRec, focus area, Faculty Health Sciences, North-West University, Potchefstroom, South Africa
| | - Jessica Lust
- Behavioural Science Institute, Radboud University, Nijmegen, Netherlands
| | - Dané Coetzee
- Physical Activity, Sport and Recreation, (PhASRec, focus area, Faculty Health Sciences, North-West University, Potchefstroom, South Africa
| | - Ludvik Valtr
- Faculty of Physical Culture, Palacký University, Olomouc, Czechia
| | - Marina Schoemaker
- University of Groningen, University Medical Centre Groningen, Centre for Human Movement Sciences, Antonius Deusinglaan 1, 9713 AV Groningen, the Netherlands
| | - Evi Verbecque
- Rehabilitation Research Centre (REVAL), Faculty of Rehabilitation Sciences, Hasselt University, Diepenbeek, Belgium
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Gauduel T, Blondet C, Gonzalez-Monge S, Bonaiuto J, Gomez A. Alteration of body representation in typical and atypical motor development. Dev Sci 2024; 27:e13455. [PMID: 37926863 DOI: 10.1111/desc.13455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 09/29/2023] [Accepted: 10/03/2023] [Indexed: 11/07/2023]
Abstract
Developmental coordination disorder (DCD) impacts the quality of life and ability to perform coordinated actions in 5% of school-aged children. The quality of body representations of individuals with DCD has been questioned, but never assessed. We hypothesize that children with DCD have imprecise body representations in the sensory and motor domains. Twenty neurotypical children, seventeen children with DCD (8-12 years old) and twenty neurotypical adults (25-45 years old) performed both sensory and motor body representation tasks: a limb identification and a limb movement task. We observed lower accuracy in the sensory task but not in the motor task. In both tasks, we observe a larger amplitude of errors, or synkinesis, in children with DCD than in neurotypical children. In neurotypical children, accuracy was lower than in neurotypical adults in the motor and sensory task, and the amplitude of sensory errors and synkinesis was higher than in neurotypical adults. Using a linear regression model, we showed that sensory accuracy is a good predictor of synkinesis production, and that synkinesis production is a good predictor of sensory accuracy, as can be expected by the perception-action loop. Results support the hypothesis of an imprecision of body representation in DCD. We suggest that this imprecision arises from noise in the body representation used at the level of internal models of action. Future studies may assess whether slower plasticity of body representations, initial imprecision, or both may account for this observation. At the clinical level, prevention strategies targeting body representation in early childhood are strategically important to limit such impairments. RESEARCH HIGHLIGHTS: Body representation is impaired in children with DCD and has a significant cost in terms of the accuracy of sensory identification of body parts and associated movements. Inaccuracies in the body representation measured in perception and in action (error amplitude and synkinesis) are related in both NT children and adults. In typical development, we provide evidence of a strong link between body schema and body image.
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Affiliation(s)
- Thomas Gauduel
- Lyon Neuroscience Research Center (CRNL), INSERM U1028-CNRS UMR 5292, University of Lyon, Bron, France
| | - Camille Blondet
- Lyon Neuroscience Research Center (CRNL), INSERM U1028-CNRS UMR 5292, University of Lyon, Bron, France
| | - Sibylle Gonzalez-Monge
- Lyon Neuroscience Research Center (CRNL), INSERM U1028-CNRS UMR 5292, University of Lyon, Bron, France
| | - James Bonaiuto
- CNRS UMR 5229, Institut des Sciences Cognitives Marc Jeannerod, Lyon, France
| | - Alice Gomez
- Lyon Neuroscience Research Center (CRNL), INSERM U1028-CNRS UMR 5292, University of Lyon, Bron, France
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Subara-Zukic E, McGuckian TB, Cole MH, Steenbergen B, Wilson PH. Locomotor-cognitive dual-tasking in children with developmental coordination disorder. Front Psychol 2024; 15:1279427. [PMID: 38510308 PMCID: PMC10951910 DOI: 10.3389/fpsyg.2024.1279427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 02/15/2024] [Indexed: 03/22/2024] Open
Abstract
Introduction Children with Developmental Coordination Disorder (DCD) demonstrate deficits in predictive motor control and aspects of cognitive control compared with their typically developing (TD) peers. Adjustment to dynamic environments depends on both aspects of control and the deficits for children with DCD may constrain their ability to perform daily actions that involve dual-tasking. Under the assumption that motor-cognitive integration is compromised in children with DCD, we examined proportional dual-task costs using a novel locomotor-cognitive dual-task paradigm that enlisted augmented reality. We expect proportional dual-task performance costs to be greater for children with DCD compared to their TD peers. Methods Participants were 34 children aged 6-12 years (16 TD, 18 DCD) who walked along a straight 12 m path under single- and dual-task conditions, the cognitive task being visual discrimination under simple or complex stimulus conditions presented via augmented reality. Dual-task performance was measured in two ways: first, proportional dual-task costs (pDTC) were computed for cognitive and gait outcomes and, second, within-trial costs (p-WTC) were measured as the difference on gait outcomes between pre- and post-stimulus presentation. Results On measures of pDTC, TD children increased their double-limb support time when walking in response to a dual-task, while the children with DCD increased their locomotor velocity. On p-WTC, both groups increased their gait variability (step length and step width) when walking in response to a dual-task, of which the TD group had a larger proportional change than the DCD group. Greater pDTCs on motor rather than cognitive outcomes were consistent across groups and method of dual-task performance measurement. Discussion Contrary to predictions, our results failed to support dramatic differences in locomotor-cognitive dual-task performance between children with DCD and TD, with both groups tending to priorities the cognitive over the motor task. Inclusion of a within-trial calculation of dual-task interference revealed an expectancy effect for both groups in relation to an impending visual stimulus. It is recommended that dual-task paradigms in the future continue to use augmented reality to present the cognitive task and consider motor tasks of sufficient complexity to probe the limits of performance in children with DCD.
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Affiliation(s)
- Emily Subara-Zukic
- Healthy Brain and Mind Research Center, School of Behavioral and Health Sciences, Australian Catholic University, Melbourne, VIC, Australia
| | - Thomas B. McGuckian
- Healthy Brain and Mind Research Center, School of Behavioral and Health Sciences, Australian Catholic University, Melbourne, VIC, Australia
| | - Michael H. Cole
- Healthy Brain and Mind Research Center, School of Behavioral and Health Sciences, Australian Catholic University, Melbourne, VIC, Australia
| | - Bert Steenbergen
- Behavioral Science Institute, Radboud University, Nijmegen, Netherlands
| | - Peter Henry Wilson
- Healthy Brain and Mind Research Center, School of Behavioral and Health Sciences, Australian Catholic University, Melbourne, VIC, Australia
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Mayes WP, Jansari A, Leonard HC. Exploring Executive Functioning of Adults With Probable Developmental Coordination Disorder Using the Jansari Assessment of Executive Functions. Dev Neuropsychol 2023; 48:315-334. [PMID: 37830357 DOI: 10.1080/87565641.2023.2264424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 09/24/2023] [Indexed: 10/14/2023]
Abstract
Many individuals with Developmental Coordination Disorder (DCD) demonstrate executive functioning difficulties on standardized assessments, yet these difficulties have not been investigated using ecologically-valid measures. 26 adults with probable DCD (pDCD), and 26 typically developing (TD) adults completed selected background measures and the Jansari assessment of Executive Functions (JEF©). JEF© is an ecologically-valid measure that provides measures of Planning, Prioritization, Selective-Thinking, Creative-Thinking, Adaptive-Thinking, and Action-, Event- and Time-Based Prospective Memory. pDCD participants were impaired relative to TD participants, with difficulties in Planning, Action-, and Event-Based Prospective Memory. These findings are consistent with self-reported difficulty and provide avenues for research investigating intervention.
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Affiliation(s)
| | - Ashok Jansari
- Department of Psychology, Goldsmiths, University of London, London, UK
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Ringold SM, McGuire RW, Jayashankar A, Kilroy E, Butera CD, Harrison L, Cermak SA, Aziz-Zadeh L. Sensory Modulation in Children with Developmental Coordination Disorder Compared to Autism Spectrum Disorder and Typically Developing Children. Brain Sci 2022; 12:brainsci12091171. [PMID: 36138908 PMCID: PMC9496992 DOI: 10.3390/brainsci12091171] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 08/27/2022] [Accepted: 08/28/2022] [Indexed: 11/16/2022] Open
Abstract
Developmental Coordination Disorder (DCD) is one of the least studied and understood developmental disorders. One area that has been minimally investigated in DCD is potential issues with sensory modulation. Further, in other neurodevelopmental disorders (e.g., autism spectrum disorder (ASD)) sensory modulation is related to many other challenges (e.g., social issues, repetitive behaviors, anxiety); however, such potential relationships in children with DCD have been largely unexplored. The purpose of this study is to explore sensory modulation differences in DCD and to understand the relationships between sensory modulation and social emotional measures, behavior, and motor skills in DCD in comparison to ASD and typically developing (TD) peers. Participants (aged 8–17) and their caregivers (DCD, N = 26; ASD, N = 57; and TD, N = 53) completed behavioral and clinical measures. The results indicated that 31% of the DCD group showed sensory modulation difficulties, with the DCD group falling between the ASD and TD groups. In the DCD group, sensory modulation was significantly associated with anxiety, empathic concern, repetitive behaviors, and motor skills. Data are compared to patterns seen in ASD and TD groups and implications for interventions are discussed.
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Affiliation(s)
- Sofronia M Ringold
- Mrs. T.H. Chan Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA 90089, USA
- Brain and Creativity Institute, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles, CA 90089, USA
| | - Riley W McGuire
- Mrs. T.H. Chan Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA 90089, USA
- Brain and Creativity Institute, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles, CA 90089, USA
| | - Aditya Jayashankar
- Mrs. T.H. Chan Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA 90089, USA
- Brain and Creativity Institute, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles, CA 90089, USA
| | - Emily Kilroy
- Mrs. T.H. Chan Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA 90089, USA
- Brain and Creativity Institute, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles, CA 90089, USA
| | - Christiana D Butera
- Mrs. T.H. Chan Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA 90089, USA
- Brain and Creativity Institute, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles, CA 90089, USA
| | - Laura Harrison
- Mrs. T.H. Chan Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA 90089, USA
- Brain and Creativity Institute, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles, CA 90089, USA
| | - Sharon A Cermak
- Mrs. T.H. Chan Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA 90089, USA
- Department of Pediatrics, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Lisa Aziz-Zadeh
- Mrs. T.H. Chan Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA 90089, USA
- Brain and Creativity Institute, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles, CA 90089, USA
- Correspondence:
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Subara-Zukic E, Cole MH, McGuckian TB, Steenbergen B, Green D, Smits-Engelsman BCM, Lust JM, Abdollahipour R, Domellöf E, Deconinck FJA, Blank R, Wilson PH. Behavioral and Neuroimaging Research on Developmental Coordination Disorder (DCD): A Combined Systematic Review and Meta-Analysis of Recent Findings. Front Psychol 2022; 13:809455. [PMID: 35153960 PMCID: PMC8829815 DOI: 10.3389/fpsyg.2022.809455] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 01/03/2022] [Indexed: 01/16/2023] Open
Abstract
AIM The neurocognitive basis of Developmental Coordination Disorder (DCD; or motor clumsiness) remains an issue of continued debate. This combined systematic review and meta-analysis provides a synthesis of recent experimental studies on the motor control, cognitive, and neural underpinnings of DCD. METHODS The review included all published work conducted since September 2016 and up to April 2021. One-hundred papers with a DCD-Control comparison were included, with 1,374 effect sizes entered into a multi-level meta-analysis. RESULTS The most profound deficits were shown in: voluntary gaze control during movement; cognitive-motor integration; practice-/context-dependent motor learning; internal modeling; more variable movement kinematics/kinetics; larger safety margins when locomoting, and atypical neural structure and function across sensori-motor and prefrontal regions. INTERPRETATION Taken together, these results on DCD suggest fundamental deficits in visual-motor mapping and cognitive-motor integration, and abnormal maturation of motor networks, but also areas of pragmatic compensation for motor control deficits. Implications for current theory, future research, and evidence-based practice are discussed. SYSTEMATIC REVIEW REGISTRATION PROSPERO, identifier: CRD42020185444.
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Affiliation(s)
- Emily Subara-Zukic
- Healthy Brain and Mind Research Centre, School of Behavioural and Health Sciences, Faculty of Health Sciences, Australian Catholic University, Melbourne, VIC, Australia
| | - Michael H. Cole
- Healthy Brain and Mind Research Centre, School of Behavioural and Health Sciences, Faculty of Health Sciences, Australian Catholic University, Melbourne, VIC, Australia
| | - Thomas B. McGuckian
- Healthy Brain and Mind Research Centre, School of Behavioural and Health Sciences, Faculty of Health Sciences, Australian Catholic University, Melbourne, VIC, Australia
| | - Bert Steenbergen
- Department of Pedagogical and Educational Sciences, Behavioural Science Institute, Radboud University, Nijmegen, Netherlands
| | - Dido Green
- Department of Health Sciences, Brunel University London, London, United Kingdom
- Department of Rehabilitation, School of Health and Welfare, Jönköping University, Jönköping, Sweden
| | - Bouwien CM Smits-Engelsman
- Division of Physiotherapy, Department of Health and Rehabilitation Sciences, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Jessica M. Lust
- Department of Pedagogical and Educational Sciences, Behavioural Science Institute, Radboud University, Nijmegen, Netherlands
| | - Reza Abdollahipour
- Department of Natural Sciences in Kinanthropology, Faculty of Physical Culture, Palacký University Olomouc, Olomouc, Czechia
| | - Erik Domellöf
- Department of Psychology, Umeå University, Umeå, Sweden
| | | | - Rainer Blank
- Heidelberg University, Heidelberg, Germany
- Klinik für Kinderneurologie und Sozialpädiatrie, Kinderzentrum Maulbronn gGmbH, Maulbronn, Germany
| | - Peter H. Wilson
- Healthy Brain and Mind Research Centre, School of Behavioural and Health Sciences, Faculty of Health Sciences, Australian Catholic University, Melbourne, VIC, Australia
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Martel M, Boulenger V, Koun E, Finos L, Farnè A, Roy AC. Body schema plasticity is altered in Developmental Coordination Disorder. Neuropsychologia 2021; 166:108136. [PMID: 34953795 DOI: 10.1016/j.neuropsychologia.2021.108136] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 11/19/2021] [Accepted: 12/21/2021] [Indexed: 10/19/2022]
Abstract
Developmental Coordination Disorder (DCD) is a pathological condition characterized by impaired motor skills. Current theories advance that a deficit of the internal models is mainly responsible for DCD children's altered behavior. Yet, accurate movement execution requires not only correct movement planning, but also integration of sensory feedback into body representation for action (Body Schema) to update the state of the body. Here we advance and test the hypothesis that the plasticity of this body representation is altered in DCD. To probe Body Schema (BS) plasticity, we submitted a well-established tool-use paradigm to seventeen DCD children, required to reach for an object with their hand before and after tool use, and compared their movement kinematics to that of a control group of Typically Developing (TD) peers. We also asked both groups to provide explicit estimates of their arm length to probe plasticity of their Body Image (BI). Results revealed that DCD children explicitly judged their arm shorter after tool use, showing changes in their BI comparable to their TD peers. Unlike them, though, DCD did not update their implicit BS estimate: kinematics showed that tool use affected their peak amplitudes, but not their latencies. Remarkably, the kinematics of tool use showed that the motor control of the tool was comparable between groups, both improving with practice, confirming that motor learning abilities are preserved in DCD. This study thus brings evidence in favor of an alternative theoretical account of the DCD etiology. Our findings point to a deficit in the plasticity of the body representation used to plan and execute movements. Though not mutually exclusive, this widens the theoretical perspective under which DCD should be considered: DCD may not be limited to a problem affecting the internal models and their motor functions, but may concern the state of the effector they have to use.
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Affiliation(s)
- Marie Martel
- Laboratoire Dynamique Du Langage, UMR5596, CNRS/University Lyon 2, Lyon, France; Integrative Multisensory Perception Action & Cognition Team - ImpAct, Lyon Neuroscience Research Center, INSERM U1028, CNRS U5292, University Lyon 1, Lyon, France.
| | - Véronique Boulenger
- Laboratoire Dynamique Du Langage, UMR5596, CNRS/University Lyon 2, Lyon, France
| | - Eric Koun
- Integrative Multisensory Perception Action & Cognition Team - ImpAct, Lyon Neuroscience Research Center, INSERM U1028, CNRS U5292, University Lyon 1, Lyon, France
| | - Livio Finos
- Department of Statistical Sciences, University of Padua, Italy
| | - Alessandro Farnè
- Integrative Multisensory Perception Action & Cognition Team - ImpAct, Lyon Neuroscience Research Center, INSERM U1028, CNRS U5292, University Lyon 1, Lyon, France; Hospices Civils de Lyon, Mouvement et Handicap, Neuro-immersion, Lyon, France; Center for Mind/Brain Sciences (CIMeC), University of Trento, Italy
| | - Alice Catherine Roy
- Laboratoire Dynamique Du Langage, UMR5596, CNRS/University Lyon 2, Lyon, France; Center for Mind/Brain Sciences (CIMeC), University of Trento, Italy
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From cerebral palsy to developmental coordination disorder: Development of preclinical rat models corresponding to recent epidemiological changes. Ann Phys Rehabil Med 2020; 63:422-430. [DOI: 10.1016/j.rehab.2019.10.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 10/14/2019] [Accepted: 10/15/2019] [Indexed: 02/05/2023]
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Delcour M, Russier M, Castets F, Turle-Lorenzo N, Canu MH, Cayetanot F, Barbe MF, Coq JO. Early movement restriction leads to maladaptive plasticity in the sensorimotor cortex and to movement disorders. Sci Rep 2018; 8:16328. [PMID: 30397222 PMCID: PMC6218548 DOI: 10.1038/s41598-018-34312-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 10/16/2018] [Indexed: 01/08/2023] Open
Abstract
Motor control and body representations in the central nervous system are built, i.e., patterned, during development by sensorimotor experience and somatosensory feedback/reafference. Yet, early emergence of locomotor disorders remains a matter of debate, especially in the absence of brain damage. For instance, children with developmental coordination disorders (DCD) display deficits in planning, executing and controlling movements, concomitant with deficits in executive functions. Thus, are early sensorimotor atypicalities at the origin of long-lasting abnormal development of brain anatomy and functions? We hypothesize that degraded locomotor outcomes in adulthood originate as a consequence of early atypical sensorimotor experiences that induce developmental disorganization of sensorimotor circuitry. We showed recently that postnatal sensorimotor restriction (SMR), through hind limb immobilization from birth to one month, led to enduring digitigrade locomotion with ankle-knee overextension, degraded musculoskeletal tissues (e.g., gastrocnemius atrophy), and clear signs of spinal hyperreflexia in adult rats, suggestive of spasticity; each individual disorder likely interplaying in self-perpetuating cycles. In the present study, we investigated the impact of postnatal SMR on the anatomical and functional organization of hind limb representations in the sensorimotor cortex and processes representative of maladaptive neuroplasticity. We found that 28 days of daily SMR degraded the topographical organization of somatosensory hind limb maps, reduced both somatosensory and motor map areas devoted to the hind limb representation and altered neuronal response properties in the sensorimotor cortex several weeks after the cessation of SMR. We found no neuroanatomical histopathology in hind limb sensorimotor cortex, yet increased glutamatergic neurotransmission that matched clear signs of spasticity and hyperexcitability in the adult lumbar spinal network. Thus, even in the absence of a brain insult, movement disorders and brain dysfunction can emerge as a consequence of reduced and atypical patterns of motor outputs and somatosensory feedback that induce maladaptive neuroplasticity. Our results may contribute to understanding the inception and mechanisms underlying neurodevelopmental disorders, such as DCD.
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Affiliation(s)
- Maxime Delcour
- Neurosciences Intégratives et Adaptatives, UMR 7260, CNRS, Aix-Marseille Université, 13331, Marseille, France
- Equipe de Recherche en Réadaptation Sensorimotrice, Faculté de Médecine, Département de Physiologie, Université de Montréal, C.P. 6128, Montréal, H3C 3J7, Canada
| | - Michaël Russier
- Neurosciences Intégratives et Adaptatives, UMR 7260, CNRS, Aix-Marseille Université, 13331, Marseille, France
- Inserm UMR 1072, Unité de Neurobiologie des Canaux Ioniques et de la Synapse, Faculté de Médecine Secteur Nord, 13344, Marseille Cedex 15, France
| | - Francis Castets
- Centre de Recherche en Neurobiologie et Neurophysiologie de Marseille UMR 7286, CNRS, Aix-Marseille Université, 13344, Marseille, France
| | | | - Marie-Hélène Canu
- Université de Lille, EA 7369 « Activité Physique, Muscle et Santé » - URePSSS - Unité de Recherche Pluridisciplinaire Sport Santé Société, 59000, Lille, France
| | - Florence Cayetanot
- Institut de Neurosciences de la Timone, UMR 7289, CNRS, Aix-Marseille Université, 13385, Marseille, France
- UMR_S1158 Inserm-Sorbonne Université, Neurophysiologie Respiratoire Expérimentale et Clinique, Faculté de Médecine, 75636, Paris Cedex, France
| | - Mary F Barbe
- Department of Anatomy and Cell Biology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, 19140, USA
| | - Jacques-Olivier Coq
- Neurosciences Intégratives et Adaptatives, UMR 7260, CNRS, Aix-Marseille Université, 13331, Marseille, France.
- Institut de Neurosciences de la Timone, UMR 7289, CNRS, Aix-Marseille Université, 13385, Marseille, France.
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