Search results for "Imagerie motrice"
showing 5 items of 5 documents
Neurophysiological mechanisms of motor imagery : effects of associated somatosensory stimulation
2018
Mental training, which involves mentally simulating an action without motor output, is an effective stimulus to improve the maximal voluntary contraction. If only the motor pathway is activated, an activation of the somatosensory cortex is observed despite the lack of afferent feedback. Indeed, the motor imagery task efficiency is based in part on an interaction between motor and sensory pathway. Thus, it’s seems reasonable to think that the addition of sensory afferent feedback during motor imagery could potentiate the motor imagery effects and thus improve motor performance. In our first study, we showed that the addition of somatosensory stimulation of Ia-afferents during a motor imagery…
Understand and optimize mental strategies during motor learning
2022
Motor imagery-based motor learning, also known as mental practice, can improve motor performance. However, questions remain concerning the mechanisms involved in mental practice, at the neurophysiological and behavioral levels. In a first study, we show an increase of short-interval intracortical inhibition during motor imagery, supporting the hypothesis that motor imagery induces the generation of an inhibited motor command. In a second study, we show modulations in functional connectivity between the cerebellum and the primary motor cortex following a mental practice session, corroborating at the neurophysiological level the hypothesis of the involvement and updating of internal models af…
Alternative methods for strength development : the case of motor imagery and neuromuscular electrical stimulation
2020
An intense practice of resistance training, i.e. with heavy loads and a low number of repetitions, can cause injuries. To avoid them or limit detraining after an injury, alternative training methods have been developed. These methods have a double target since they also allow populations with different pathologies to practice a physical activity. This thesis focused particularly on the neuromuscular system and the mechanisms involved in strength development on plantar flexors muscles following motor imagery (MI), i.e. mental simulation of a movement without its concomitant motor output, and neuromuscular electrical stimulation (NMES), i.e. evoking contractions through electrical current app…
Effet de l’imagerie motrice prolongée sur la perception de l’effort et ses corrélats neuronaux
2017
International audience
Study of behavioral and neurophysiological mechanisms following motor imagery training
2017
For many years, research in motor control, sport science and rehabilitation focused on the performance improvement following mental practice. However, some mechanisms, behavioral and neurophysiological, remain insufficiently understood. In our first study, we demonstrated the impossibility to predict the future performance improvement following imagined repetitions of a speed accuracy trade-off task, with a subjective evaluation of imagery ability of young healthy individuals. However, it is essential to produce clear and vivid mental simulations throughout the training to obtain a better performance improvement. Besides, by a further analysis of performance, the results of our second study…