Tool-use reshapes the boundaries of body and peripersonal space representations

Elisa Canzoneri, Silvia Ubaldi, Valentina Rastelli, Alessandra Finisguerra, Michela Bassolino, Andrea Serino
2013 Experimental Brain Research  
interaction task and BR by means of a tactile distance perception task and a body-landmarks localisation task, before and after using a 1-m-long tool to reach far objects. Tool-use extended the representation of PPS along the tool axis and concurrently shaped BR; after tool-use, subjects perceived their forearm narrower and longer compared to before tool-use, a shape more similar to the one of the tool. Tool-use was necessary to induce these effects, since a pointing task did not affect PPS and
more » ... BR. These results show that a brief training with a tool induces plastic changes both to the perceived dimensions of the body part acting upon the tool and to the space around it, suggesting a strong overlap between peripersonal space and body representation.
doi:10.1007/s00221-013-3532-2 pmid:23640106 fatcat:uqikxlqobrb2hoelmthrzqfdv4