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Multisensory Space & Action| old_uid | 2863 |
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| title | Multisensory Space & Action |
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| start_date | 2007/05/21 |
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| schedule | 14h30 |
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| online | no |
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| location_info | salle F 106 |
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| details | suite à 15h45 |
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| summary | The notion of body schema has been proposed to include at least par of the extra-corporeal space. Neurophysiological and neuropsychological evidence converged in showing that the space immediately surrounding our body (i.e., the near peri-personal space, PPS) is represented through the integrated processing of multiple sensory inputs. Multisensory representations of the PPS have been proposed to deserve the function of A) localising stimuli approaching the subject’s body to automatically drive defensive movements, and B) embodying tools to purposefully acting on objects. After reviewing patients-based evidence providing indirect support to both kinds of functions, here we report new findings concerning the effects of voluntary action on the corporeal representation of our acting body. Two experiments on normal subjects will be presented providing direct evidence that 1) multisensory space coding of nearby objects changes when we grasp them, and 2) the kinematics of grasping an object with our hand is modified if we previously grasped the same object with a 40cm-long articulated grasping tool. We conclude that action affects multisensory perception in a way that is selective for the body-parts involved in action, and suggest that the body schema can dynamically vary to incorporate temporary corporeal changes induced by tool-use. |
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| responsibles | Roy |
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