Highs and Lows in Motor Control Development |
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| Authors: | Marie Martel Pierre Fourneret Livio Finos Christina Schmitz Alice Catherine Roy |
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| Affiliation: | 1. Laboratoire Dynamique Du Langage, Université Lyon 2, Université de Lyon, Lyon, France.;2. Université Claude Bernard Lyon 1, Université de Lyon, Lyon, France.marie.martel@isc.cnrs.fr;4. Université Claude Bernard Lyon 1, Université de Lyon, Lyon, France.;5. Institut des Sciences Cognitives Marc Jeannerod, Service de Psychopathologie du Développement, H?pital Femme-Mère-Enfant, Hospices Civils de Lyon, Bron, France.;6. Department of Statistical Sciences, University of Padova, Padua, Italy.;7. Lyon Neuroscience Research Center, Brain Dynamics and Cognition Team, Université de Lyon, Lyon, France.;8. Université Claude Bernard Lyon 1, Université de Lyon, Lyon, France. |
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| Abstract: | AbstractMotor control is classically described as relying on two components: anticipatory control (feedforward processing) and online control (feedback processing). Here we aimed to unveil the developmental steps of both feedback and feedforward control in 5–10 years old children, using a simple and ecological task. We manipulated object’s weight in a reach-to-displace paradigm. When the weight was known before lifting it, anticipatory processes were quantifiable during the reaching phase. Conversely, an unknown weight triggered online corrections during the displacing phase. Movement kinematics revealed that children anticipate this objet property as young as 5 y-o. This anticipation becomes adequate around 7 y-o and is paralleled by poor online corrections. This simple yet relevant paradigm should allow quantifying deviations from neurotypical patterns in disorders of motor control. |
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| Keywords: | Reach-and-grasp anticipatory control online control children motor development kinematics |
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