To interact efficiently with the environment, one must put in correspondence spatial perceptive information with adequate motor behavior. How these percepts are converted in motor responses and the eventual implication of magnitude processing (estimation of distances, sizes, weights…) in this conversion is not perfectly understood. This thesis aims to investigate if action representations, numerical cognition and space perception share common functional mechanisms. To do so, several experimental priming and interference paradigms were used to examine how moderating represented body capabilities and processing numbers can influence spatial categorization and distance estimation. The observation reported in the present work support the implication of dynamic body capability representations and a common magnitude processing system in space perception.