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L’introduction examine la place de la notion d’instrumentation du corps, élaborée par André Bullinger, et la propose comme une notion-carrefour rendant compte de la sensori-motricité solitaire, tournée vers l’organisation de soi comme ensemble cohérent, et de la sensori-motricité partagée, tournée vers une construction dynamique duelle nécessitant le dialogue des organisations individuelles pour mieux les dépasser.

The present introduction examines the notion of instrumentation of the body, as conceived by André Bullinger. Our proposal is that this notion allows us to find a pathway between a solitary sensory-motricity and a shared sensory-motricity. While solitary sensory-motricity would allow the building of self as a coherent entity, shared sensory-motricity would lead to a dynamical dual organization of two coherent entities feeding each other toward continuous reorganizations.