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26. Prism adaptation by mental practice

Author

Thierry Pozzo, Carine Michel, Charalambos Papaxanthis, Jérémie Gaveau, Cognition, Action, et Plasticité Sensorimotrice [Dijon - U1093] ( CAPS ), Université de Bourgogne ( UB ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Department of Robotics, Brain and Cognitive Sciences ( RBCS ), Istituto Italiano di Tecnologia ( IIT ), Michel, Carine, Cognition, Action, et Plasticité Sensorimotrice [Dijon - U1093] (CAPS), Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM), Department of Robotics, Brain and Cognitive Sciences (RBCS), and Istituto Italiano di Tecnologia (IIT)

Subjects
Adult, Male, Visual perception, Movement, Cognitive Neuroscience, Experimental and Cognitive Psychology, Adaptation (eye), Sensory system, Developmental psychology, Young Adult, Motor imagery, Feedback, Sensory, Humans, [SDV.NEU] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Neuronal Plasticity, Proprioception, Adaptation, Physiological, Visual field, Neuropsychology and Physiological Psychology, Prism adaptation, Practice, Psychological, [ SDV.NEU ] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Imagination, Visual Perception, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Female, Prism, Visual Fields, Psychology, Psychomotor Performance, Cognitive psychology
Abstract

International audience; The prediction of our actions and their interaction with the external environment is critical for sensorimotor adaptation. For instance, during prism exposure, which deviates laterally our visual field, we progressively correct movement errors by combining sensory feedback with forward model sensory predictions. However, very often we project our actions to the external environment without physically interacting with it (e.g., mental actions). An intriguing question is whether adaptation will occur if we imagine, instead of executing, an arm movement while wearing prisms. Here, we investigated prism adaptation during mental actions. In the first experiment, participants (n = 54) performed arm pointing movements before and after exposure to the optical device. They were equally divided into six groups according to prism exposure: Prisms-Active, Prisms-Imagery, Prisms-Stationary, Prisms-Stationary-Attention, No Conflict-Prisms-Imagery, No Prisms-Imagery. Adaptation, measured by the difference in pointing errors between pre-test and post-test, occurred only in Prisms-Active and Prisms-Imagery conditions. The second experiment confirmed the results of the first experiment and further showed that sensorimotor adaptation was mainly due to proprioceptive realignment in both Prisms-Active (n = 10) and Prisms-Imagery (n = 10) groups. In both experiments adaptation was greater following actual than imagined pointing movements. The present results are the first demonstration of prism adaptation by mental practice under prism exposure and they are discussed in terms of internal forward models and sensorimotor plasticity.

Published
2013

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