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Publications (115)
This poster presents the preliminary results about the validation of the French version of the Adult Dyspraxia/Developmental Coordination Disorder Checklist (ADC) created by Kirby and al. (2010).
Procedural learning has been mainly tested through motor sequence learning tasks in children with neurodevelopmental disorders, especially with isolated Developmental Coordination Disorder (DCD) and Reading Disorder (RD). Studies on motor adaptation are scarcer and more controversial. This study aimed to compare the performance of children with iso...
The principles of motor learning have been applied in neurological rehabilitation for years. The underlying assumption is that these principles that have been identified in research on healthy individuals would also apply to those with neurological disorders, making them highly relevant for rehabilitation. However, there is currently no tool dedica...
Procedural learning refers to a set of experience-related processes leading to a change in motor, perceptual or cognitive skills (Cohen & Squire, 1980). One of the most commonly used tasks to assess this learning is the serial reaction time task (SRTT, Nissen & Bullemer, 1987). In this task, participants have to press a key on a keyboard correspond...
Intentionally or not, humans produce rhythmic behaviors (e.g., walking, speaking, and clapping). In 1974, Paul Fraisse defined rhythmic behavior as a periodic movement that obeys a temporal program specific to the subject and that depends less on the conditions of the action (p. 47). Among spontaneous rhythms, the spontaneous motor tempo (SMT) corr...
Developmental Coordination Disorder (DCD) is a neurodevelopmental disorder characterized by motor impairments occurring during early development and interfering with daily activities without sensorial or neurologic disease. Motor execution is slow and clumsy and difficulties can persist into adulthood. These motor deficits could result from an alte...
Rhythm is defined as the repetition of external stimuli occurring at regular intervals. Some studies showed that brain oscillations are modified during perception of rhythmic stimuli by either their tempo (low, medium, fast) or their sensory modality (auditory, visual, audio-visual). Moreover, electroencephalographic (EEG) studies highlighted a des...
Cerebral palsy (CP) is set of motor disorders due to early and non-progressive brain alteration during infant development. CP alters the ability to respond as fast as possible to a given stimulus, as measured by reaction times (RTs). In healthy adults and typically developing (TD) children, the sensory modality of stimuli (visual, auditory or both)...
Introduction:
Posterior fossa tumor (PFT) survivors have difficulty learning new skills. Procedural memory is a skill learning system that allows, through training, the automatization of procedures and progressive improvement of performance. It underlies most of the motor procedures in everyday life that we perform automatically, such as riding a...
La Paralysie Cérébrale (PC) se caractérise par des troubles moteurs persistants consécutifs à une lésion neurologique périnatale. Elle entraîne des répercussions sur les activités de la vie quotidienne et la participation sociale de ces enfants (Novak et al., 2013). Les interventions rééducatives impliquant la synchronisation rythmique sont de plus...
IntroductionProcedural perceptual-motor learning of sequences (PPMLS) provides perceptual-motor skills in many activities of daily living. Based on behavioral and neuroimaging results, theoretical models of PPMLS postulate that the cortico-striatal loop, the cortico-cerebellar loop and the hippocampus are specifically involved in the early stage of...
Background:
Since 1990's, the cognitive profile of children with a neurofibromatosis type 1 (NF1) has been refined by many different studies. Children with NF1 may exhibit a variety of cognitive dysfunctions. Memory difficulties have been reported, but the results are contradictory and, compared to other cognitive functions, memory has been less e...
Introduction
Neurofibromatosis type 1 (NF1) is considered a model of neurodevelopmental disorder because of the high frequency of learning deficits, especially developmental coordination disorder. In neurodevelopmental disorder, Nicolson and Fawcett formulated the hypothesis of an impaired procedural learning system that has its origins in cortico-...
Objectives
Specific brain structures are involved in the different mnesic systems: hippocampus in episodic and semantic memory, striatum in sequence learning part of procedural memory and cerebellum in motor adaptation part of procedural memory and working memory. The aim of this work was to explore the impact of irradiation at brain structures inv...
Le rythme peut se définir comme la répétition d’un stimulus apparaissant à intervalle régulier. Le tempo et la modalité des stimuli peuvent faciliter la synchronisation à des rythmes. Ces mêmes facteurs pourraient moduler la perception de rythmes, mesurée par les activations cérébrales des régions motrices. Cette étude explore les réponses cérébral...
Nous avons mené une enquête auprès des orthophonistes francophones
pour connaître leurs conceptions et leur utilisation du « rythme » en clinique. Malgré la présence importante du rythme dans leur pratique, les orthophonistes se sentent peu informés sur ce concept et ses possibles effets sur le langage et ses troubles. Nous verrons pourtant que la...
Sensorimotor synchronization (SMS) is a natural healthy human skill and is particularly accurate andstable with auditory or audio-visual compared to visual rhythmic stimuli. However, inter-individual differences exist in rhythmic abilities, probably due to the intervention of cognitive functions such as attention. In thepresent study, we aimed to t...
INTRODUCTION: Procedural memory (PM) is a skill learning system that allows, through training, the automatization of procedures and progressive improvement of performances. The aim of this work was to explore the impact of a posterior fossa tumor (PFT) on PM. We hypothesized that motor adaptation, depending on cortico-cerebellar system, was impaire...
Today's estimates indicate that nearly 50% of children with Neurofibromatosis type 1 (NF1) suffer from reading disabilities, with a high impact on their academic achievement. In addition to the well-documented importance of phonological skills in reading acquisition and neurodevelopmental disorders, visual-attention processes also appear as importa...
The present study investigates procedural learning of motor sequences in children with developmental coordination disorder (DCD) and/or developmental dyslexia (DD), typically-developing children (TD) and healthy adults with a special emphasis on (1) the role of the nature of stimuli and (2) the neuropsychological functions associated to final perfo...
Procedural learning is essential for the effortless execution of many everyday life activities. However, little is known about the conditions influencing the acquisition of procedural skills. The literature suggests that sensory environment may influence the acquisition of perceptual-motor sequences, as tested by a Serial Reaction Time Task. In the...
Background
Posterior fossa tumors represent two thirds of brain tumors in children. Although progress in treatment has improved survival rates over the past few years, long-term memory impairments in survivors are frequent and have an impact on academic achievement. The hippocampi, cerebellum and cerebellar-cortical networks play a role in several...
Sensorimotor synchronization (SMS) to rhythmic stimuli is a natural human skill. In adults, accuracy and stability of SMS depend on several factors such as the modality of stimuli (Repp & Su, 2013). SMS is more stable with audio-visual compared to auditory or visual stimuli (Blais et al., 2015). It remains to know if this effect is affected by the...
Mirror contractions refer to unintended contractions of the contralateral homologous muscles during voluntary unilateral contractions or movements. Exaggerated mirror contractions have been found in several neurological diseases and indicate dysfunction or lesion of the cortico-spinal pathway. The present study investigates mirror contractions and...
Mirror movements (MM) refer to the involuntary movements or contractions occurring in homologous muscles contralateral to the unilateral voluntary movements. This behavioural manifestation increases in elderly. In right-handed adults, some studies report asymmetry in MM production, with greater MM in the right dominant hand during voluntary movemen...
This study investigates the procedural learning, retention, and reactivation of temporal sensorimotor sequences in children with and without developmental coordination disorder (DCD). Twenty typically-developing (TD) children and 12 children with DCD took part in this study. The children were required to tap on a keyboard, synchronizing with audito...
Studies have suggested a dysfunction in oculomotor skills in children with developmental coordination disorder (DCD). It has been proposed that the Developmental Eye Movement (DEM) test is useful in testing the dyslexics' (DD) oculomotor behavior during reading, in a simple and indirect manner. The present study aimed at exploring the oculomotor be...
Objective
Many studies report a deficit in working memory in children with Developmental Dyslexia (DD) and Developmental Coordination Disorder (DCD) compared to children with Typical Development (TD). In this study, we questioned the working memory profile of children with co-occurring Developmental Dyslexia and Developmental Coordination Disorder...
Rhythmic abilities are impaired in Developmental Coordination Disorder (DCD) but learning deficit of procedural skills implying temporal sequence is still unclear. Current contradictory results suggest that procedural learning deficits in DCD highly depends on learning conditions. The present study proposes to test the role of sensory modality of s...
Purpose of Review
Classical view of disconnection refers to damage in white matter connections leading to behavioral deficits on sensorimotor and cognitive tasks in brain-injured patients. A more recent conception refers to dysconnection, that means abnormal connectivity between brain regions, as found in psychiatric, neurodegenerative, and neurode...
Aims: Cerebral palsy (CP) impacts motor functions such as balance,limits of stability and walking, and may also affect other functionssuch as attention and rhythm production. Motor and non-motor def-icits lead to difficulties in daily life activities. The main objective ofthis study was to evaluate the effects of a dance intervention on bal-ance in...
Le trouble développemental de la coordination (TDC), ou dyspraxie, est un trouble fréquent qui repose sur des diagnostics indiquant la présence chez l’enfant d’un trouble développemental se manifestant principalement dans des habiletés gestuelles, et se traduisant souvent par des difficultés d’apprentissage à l’école ainsi que par des limitations d...
Background: Mirror movements (MM) refer to the involuntary contractions occurring in homologous muscles contralateral to the voluntary movements, particularly in the distal upper limb muscles. In healthy adults, discreet MM can be observed during complex rhythmic or effortful tasks through electromyographic (EMG) activity. In right-handed adults, s...
Studies have suggested a dysfunction in oculomotor skills in children with developmental coordination disorder (DCD). It has been proposed that the Developmental Eye Movement (DEM) test is useful in testing the dyslexics’ (DD) oculomotor behavior during reading, in a simple and indirect manner. The present study aimed at exploring the oculomotor be...
Introduction: The natural tendency to synchronize movements to rhythmic auditory stimulations (RAS) is used in rehabilitation. RAS has shown motor benefits in population with CP. However, little is known about the capacity of children with CP to intentionally synchronize to RAS and continue to produce the required rhythm.
Methods: 10 children with...
Using an adapted serial reaction time task (SRTT), we investigate the conditions that could facilitate procedural motor learning for children with CP. Given that auditory and multisensory stimulations are known to improve reaction time (RT), we expect to improve procedural learning of a perceptual-motor sequence by introducing auditory stimulations...
Purpose: Cerebral palsy is a neurological disorder not only affecting motor functions but also cognitive and psychosocial dimension. Multispecialty therapies are needed to address these dimensions. Dance practice provides multidimensional benefits for people with various neurological disorders and may present a real potential for people with cerebr...
Mirror movements (MM) refer to involuntary contractions occurring in homologous muscles contralateral to the voluntary movements. In right-handers, greater MM occur in the right hand during movements of the non-dominant left hand than conversely. However, it remains to know if such behavioural asymmetry of MM relies only on motor processes or if it...
This commentary is on the original article by Riddell et al. on pages 943–949 of this issue.
Introduction :
La paralysie cérébrale (PC) est la première cause de déficience motrice chez l'enfant. Elle a des répercussions sur l'équilibre statique et dynamique dans les activités quotidiennes, et touche également les dimensions cognitives et psychosociales des adolescents (1). La danse est une approche globale intéressante pour entraîner l'équ...
Objective: To elucidate the adverse consequences of spasticity and spastic co-contraction of elbow flexors on motor impairment and upper limb functional limitation.
Design: A pilot case-controlled prospective observational study.
Subjects: Ten brain-injured adults, and 10 healthy controls.
Methods: The co-contraction index was computed from electro...
Introduction: Implicit procedural learning is essential for the effortless execution of many everyday life activities. It refers to the unintentional memorization of motor or cognitive procedures. The most popular task used to study this process is the serial reaction time task (SRTT) which is a four-choice reaction time task (RT) in which particip...
Introduction : La pratique de la danse en thérapie présente des intérêts moteurs, cognitifs et psychosociaux pour les personnes ayant des troubles neurologiques variés. La paralysie cérébrale (PC) est la première cause de handicap moteur chez l’enfant. Elle peut aussi toucher la cognition et avoir des répercussions psychosociales importantes. Un pr...
Objectives
During and after the completion of a motor task, an event-related desynchronization (ERD) and synchronization (ERS) – i.e., a decrease and increase of the 13–31 Hz spectral magnitude–are respectively recorded over the motor cortex (M1). The ERD is supposed to reflect M1 involvement to perform the motor task [1], [2] while the ERS is supp...
Introduction/Background Muscle overactivity, including spas- ticity and spastic cocontraction, is an involuntary motor unit recruitment participating in the spastic paresis syndrome after cerebral injury. Spasticity is defined as velocity-dependent increase in tonic stretch reflexes. Spastic cocontraction refers to increased antagonist muscles recr...
Introduction : Mirror movements (MM) refer to the involuntary contractions occurring in homologous muscles contralateral to the voluntary movements, particularly in the distal upper limb muscles. It has been found that brain-injured patients present exacerbated MM. Attentional and inhibitory processes have been proposed as a key factor to explain t...
It has been shown that brain-injured patients have exacerbated mirror movements (MM). MM are involuntary contractions occurring in homologous muscles contralateral to voluntary movements, particularly in distal upper limb muscles. Attentional and inhibitory processes have been proposed as key factors to explain the level of MM. However, the link be...
RÉSUMÉ :
La rééducation psychomotrice vise à améliorer les fonctions sensorielles, motrices, cognitives et/ou psychosociales de personnes présentant des difficultés d’adaptation ou des troubles. Pour cela, le psychomotricien réalise un bilan exhaustif et objectif des points forts et des déficits de la personne. Il propose ensuite des situations vi...
Introduction: During isometric contractions, the level of antagonist muscles activation is increased in people with cervical spinal cord injury (cSCI) in comparison to healthy participants. This alteration of antagonists activation after cSCI has been primarily associated with a lower cortical control of the spinal mechanisms -especially reciprocal...
Psychomotor therapy aims at improving sensory, motor, cognitive and/or psychosocial functions of patients with adaptation difficulties or troubles. The model of cerebral lesions has highlighted that spontaneous or intervention-related behavioral improvements are the result of neuroplasticity, that is, the cerebral reorganizations to adapt to extern...
Developmental Dyslexia (DD) is a complex and heterogeneous learning disability frequently associated with other neurodevelopmental disorders, such as Developmental Coordination Disorder (DCD). Epidemiological studies demonstrate a rate of comorbid diagnosis of DCD in 16% (Kaplan et al., 2001) to 70% (Iversen et al., 2005) of children with DD. The f...
Developmental Dyslexia (DD) is a complex and heterogeneous learning disability frequently associated with other neurodevelopmental disorders, such as Developmental Coordination Disorder (DCD). Epidemiological studies demonstrate a rate of comorbid diagnosis of DCD in 16% (Kaplan et al., 2001) to 70% (Iversen et al., 2005) of children with DD. The f...
Muscle overactivity, including spasticity and spastic cocontraction, is an involuntary motor unit recruitment participating in the spastic paresis syndrome after cerebral injury such as stroke. Spasticity is defined as velocity-dependent increase in tonic stretch reflexes. Spastic cocontraction (SCC), as assessed by muscle cocontraction, refers to...
Les mouvements miroirs (MM) sont des contractions involontaires des muscles homologues controlatéraux aux muscles volontairement activés. Chez le sujet sain, les MM sont révélés à partir d’acquisitions électromyographiques (EMG), particulièrement lors de contractions musculaires du membre supérieur à faible niveau de force. Ces MM sont supposés rés...
Le mouvement est contrôlé au niveau cortical par des activations complexes des réseaux moteurs, qui incluent notamment le cortex moteur primaire (M1). L’activité électrique émise à chaque instant par les groupes de neurones du cortex peut être enregistrée par électroencéphalographie (EEG) avec une bonne résolution temporelle. Lors d’une contraction...
Little attention is paid to motor control in Alzheimer’s disease (AD) although it is a relevant sign of central nervous system integrity and functioning. In particular, unimanual and bimanual tapping is a relevant paradigm because it requires intra- and inter-hemispheric transfer (IHT). Previous results indicate that both unimanual and anti-phase t...
After spinal cord injury (SCI), the reorganization of the neuromuscular system leads to increased antagonist muscles’ co-activation – i.e., increased antagonist vs. agonist muscles activation ratio – during voluntary contractions. Increased muscle co-activation is supposed to result from reduced cortical influences on spinal mechanisms inhibiting a...
This study tested the learning of a new bimanual coordination in teenagers with and without Developmental Coordination Disorder (DCD). Both groups improved accuracy of the new coordination. No difference was found on stability. But DCD teenagers exhibited an overall higher number of additional taps, suggesting a persistent lack of motor inhibition...
Impairment of motor learning skills in developmental coordination disorder (DCD) has been reported in several studies. Some hypotheses on neural mechanisms of motor learning deficits in DCD have emerged but, to date, brain-imaging investigations are scarce. The aim of the present study is to assess possible changes in communication between brain ar...
The most common neurodevelopmental disorders (e.g., developmental dyslexia (DD), autism, attention-deficit hyperactivity disorder (ADHD)) have been the subject of numerous neuroimaging studies, leading to certain brain regions being identified as neural correlates of these conditions, referring to a neural signature of disorders. Developmental coor...
Post-movement beta synchronization (PMBS) modulations have been related to sensory reafferences after movement initiation and inhibitory processes after movement interruption. Although these processes have been separately studied in young and old adults, little is known about the age-related changes in PMBS during selective inhibitory control (i.e....
This study tests whether impairment in action-perception coupling could be associated with an alteration of the sensorimotor function. To this aim, the cortical activities underlying the sensorimotor function were recorded in twelve volunteers in a reach-to-grasp paradigm, in which the level of anxiety and the position of a glass were manipulated....
Objective:
Recent theories hypothesize that procedural learning may support the frequent overlap between neurodevelopmental disorders. The neural circuitry supporting procedural learning includes, among others, cortico-cerebellar and cortico-striatal loops. Alteration of these loops may account for the frequent comorbidity between Developmental Co...
The modulation of electroencephalographic (EEG) activity of the motor, frontal and associative cortical area is involved in the realization, perception and representation of a motor performance. Although we recently found that cortical activities related to action-perception coupling are altered under anxiety-related homeostatic state, it remains t...
The purpose of this study was to test how the sensory modality of rhythmic stimuli affects the production of bimanual coordination patterns. To this aim, participants had to synchronize the taps of their two index fingers with auditory and visual stimuli presented separately (auditory or visual) or simultaneously (audio-visual). This kind of task r...