The body is made up of parts. This basic assumption is central in most neuroscientific studies of bodily sensation, body representation and motor action. Yet, the assumption has rarely been considered explicitly. We may indeed ask how the body is internally segmented and how body parts can be defined. That is, how can we sketch the mereology of the body? Here we distinguish between a somatosensory mereology and a motor mereology.

Are bodily self-ascriptions immune to error through misidentification? According to the Inside mode view, one cannot be mistaken about whose body part it is when experiencing them from the inside. Here I shall consider two possible objections to bodily immunity. On the one hand, I shall briefly envisage two cases of misidentification: somatoparaphrenia and the Rubber Hand illusion. I shall show that none of them challenges the immunity principle. On the other hand, I shall highlight a more serious issue for (...) bodily immunity, namely, the multimodal nature of bodily self-knowledge. Very few bodily self-ascriptions are based on grounds that are purely or exclusively from the inside. I shall evaluate the consequences of multimodality for bodily immunity. (shrink)

How do humans manage to keep track of a gradually changing object or person as the same persisting individual despite the fact that the extraction of information about this individual must often rely on heterogeneous information sources and heterogeneous tracking methods? The article introduces the Empirical Tracking of Individuals theory to address this problem. This theory proposes an analysis of the concept of integrated tracking, which refers to the capacity to acquire, store, and update information about the identity and location (...) of individuals in our environment. It hypothesizes that certain functions of attention are a key to explaining how the cognitive flexibility of the human mind overcomes the heterogeneity of sources and methods in integrated tracking. At least two premises lend support to this hypothesis. First, heterogeneity of tracking sources is overcome by the combination of information from multiple perceptual modalities and a phenomenon of multisensory 'transparency'. Second, heterogeneity of tracking sources and methods may also be overcome by inferences that combine information across domains to acquire reasons to believe propositions about the target's location and identity. (shrink)