About this trial
The general purpose of this research project is to analyze the specific role of motor imagery on motor learning, assessed through corticospinal excitability measurements and behavioral data collection. This project is based on four sequences. For Sequence 1, the main objective is to examine the effect of mental training on movement speed and accuracy in a manual motor sequence task, as well as the influence of sensory feedback in immediate post-test (i.e., execution of a similar, but not identical, manual motor sequence, other manual tasks) on performance in delayed post-test. The secondary objective will be to examine corticospinal changes (i.e., amplitude of motor evoked potentials) induced by mental training, by measuring the amplitude of motor evoked potentials before and after mental training. For Sequence 2, the main objective is to examine the impact of a motor disturbance induced by a robotic arm at different intervals during the motor imagery process. The secondary objective will be to examine the corticospinal changes (i.e. amplitude of evoked motor potentials) induced by mental training as a function of the applied perturbations, before and after perturbation. For Sequence 3, the main objective will be to examine the influence of neuroplasticity on the quality of mental training. More specifically, the investigators will study the links between brain plasticity and motor learning through mental training. The secondary objective will be to examine the corticospinal changes (i.e. amplitude of evoked motor potentials) induced by mental training at different levels of the neuromuscular system (cortical, cervicomedullar, peripheral) after a training period. For Sequence 4, the main objective will be to examine the effect of short-term arm-immobilization of on the retention of motor learning induced by mental training. The secondary objective will be to examine the corticospinal changes (i.e., amplitude of motor evoked potentials) induced by of short-term arm-immobilization, or by transcranial direct current stimulation (tDCS), on motor learning. The results of this fundamental research project will allow a better understanding of neurophysiological and behavioral mechanisms that underlie motor learning through motor imagery. The results will allow to efficiently consider inter-individual specificities and will thus open up to clinical research perspectives, towards the establishment of adapted motor rehabilitation protocols.
Eligibility criteria
This trial accepts healthy volunteersQualifiers
Male or female between 18 and 60 years old
Having given written informed consent
Affiliated to a social security scheme
Disqualifiers
History of psychiatric illness (declarative)
Person under guardianship, curatorship, safeguard of justice
Neurological problem that could bias the results of the study (declarative)
Personal or family history of epilepsy
Trial design
Factorial
Treatments tested in this trial
Transcranial magnetic stimulation
DeviceMagnetic stimulation of the cortex
Peripheral Nerve Stimulation
DeviceElectric stimulation of the nerves
Transcranial direct current stimulation
DeviceElectric stimulation of the cortex
Paired Associative Stimulation
DeviceCombined magnetic and electric stimulation of cortex and nerve, respectively
Wrist
DeviceShort-term immobilization of the arm
Robotic arm
DeviceExternal perturbation of force field induced by robotic arm
Cervicomedullar stimulation
DeviceElectric stimulation of the muscle
Physical training
Other interventionTraining to perform the task by actually doing the task
Mental training
Other interventionTraining to perform the task by imaging doing the task
Treatment groups
28
Treatment groupsSee each treatment group below.
Trial outcomes
Primary outcomes
Evolution of movement speed - Sequence 1
The duration of performed movement sequences
Evolution of movement accuracy - Sequence 1
The accuracy of performed movement sequences (i.e., the correspondence between the performed finger motor sequences and the requested finger motor sequence).
Evolution of trajectory error - Sequence 2
The area under the curve of hand's trajectory according to the straight line joining the starting target and the final target.
Evolution of maximal deviation - Sequence 2
The maximal perpendicular distance between the position of the hand and the straight line joining the starting target and the final target
Secondary outcomes
Evolution of motor evoked potentials amplitude - Sequence 1
Peak-to-peak amplitude of motor evoked potentials
Evolution of motor evoked potentials amplitude - Sequence 2
Peak-to-peak amplitude of motor evoked potentials
Evolution of motor evoked potentials amplitude - Sequence 3
Peak-to-peak amplitude of motor evoked potentials
Evolution of motor evoked potentials amplitude - Sequence 4
Peak-to-peak amplitude of motor evoked potentials
Sponsors and contacts
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