Neurophysiological data indicate that the reachable peripersonal space and the unreachable extrapersonal space are represented in segregated parieto-frontal circuits and that when the unreachable space becomes reachable because of tool use, it is automatically coded by the network selective for peripersonal space. Here we directly tested the role of action’s consequences in space coding. Thirty-eight participants bisected lines at either a reachable distance (60 cms) or unreachable distance (120 cms) using either a laser pointer or laser cutter. The laser cutter but not the laser pointer had an action consequence; the line broke into two pieces. The results showed that distance moderated the effect of action. At an unreachable distance, the mean bisection point was closer to the center when participants used the laser cutter compared to when they used the laser pointer. There were no differences at a reachable distance (60 cms). This result suggests that the space in which the individual may determine a physical consequence is categorized as peripersonal space, independently from its actual distance from the individual’s body
A behavioural experiment in virtual reality to verify the role of action function in space coding
CRAIGHERO, Laila
2013
Abstract
Neurophysiological data indicate that the reachable peripersonal space and the unreachable extrapersonal space are represented in segregated parieto-frontal circuits and that when the unreachable space becomes reachable because of tool use, it is automatically coded by the network selective for peripersonal space. Here we directly tested the role of action’s consequences in space coding. Thirty-eight participants bisected lines at either a reachable distance (60 cms) or unreachable distance (120 cms) using either a laser pointer or laser cutter. The laser cutter but not the laser pointer had an action consequence; the line broke into two pieces. The results showed that distance moderated the effect of action. At an unreachable distance, the mean bisection point was closer to the center when participants used the laser cutter compared to when they used the laser pointer. There were no differences at a reachable distance (60 cms). This result suggests that the space in which the individual may determine a physical consequence is categorized as peripersonal space, independently from its actual distance from the individual’s bodyI documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
