This paper investigates the role of a pre-existing body-model that is an enabling constraint for the incorporation of objects into the body. This body-model is also a basis for the distinction between body extensions (e.g., in the case of tool-use) and incorporation (e.g., in the case of successful prosthesis use). It is argued that, in the case of incorporation, changes in the sense of body-ownership involve a reorganization of the body-model, whereas extension of the body with tools does not involve (...) changes in the sense of body-ownership. (shrink)

Focusing on the interactions between people suffering from neuromuscular diseases and their wheelchairs, the author raises the question of action: how is action made possible for people suffering from neuromuscular diseases? Starting with actor-network theory, the author shows that action not only results from distribution and delegation to heterogeneous entities but emerges from hard and lengthy work that makes the relation between them possible and transforms the entities involved. The author describes this work, called the process of adjustment, as work (...) on the links making a person, his or her body, and his or her world. Through this work, new possibilities of action emerge for the person, but also new abilities; the person’s identity is transformed and shaped. This analysis leads to a particular conception of the person as made up through his or her relations to other entities. (shrink)

Plasticity of body representation fundamentally underpins human tool use. Recent studies have demonstrated remarkably complex plasticity of body representation in humans, showing that such plasticity (1) occurs flexibly across multiple time scales and (2) involves multiple body representations responding differently to tool use. Such findings reveal remarkable sophistication of body plasticity in humans, suggesting that Vaesen may overestimate the similarity of such mechanisms in humans and non-human primates.