title: Covert motor activity on NoGo trials in a task sharing paradigm: evidence from the lateralized readiness potential.
abstract: Previous studies on task sharing propose that a representation of the co-actor's task share is generated when two actors share a common task. An important function of co-representation seems to lie in the anticipation of others' upcoming actions, which is essential for one's own action planning, as it enables the rapid selection of an appropriate response. We utilized measures of lateralized motor activation, the lateralized readiness potential (LRP), in a task sharing paradigm to address the questions (1) whether the generation of a co-representation involves motor activity in the non-acting person when it is other agent's turn to respond, and (2) whether co-representation of the other's task share is generated from one's own egocentric perspective or from the perspective of the actor (allocentric). Results showed that although it was the other agent's turn to respond, the motor system of the non-acting person was activated prior to the other's response. Furthermore, motor activity was based on egocentric spatial properties. The findings support the tight functional coupling between one's own actions and actions produced by others, suggesting that the involvement of the motor system is crucial for social interaction.
authors.affiliation: Department of Psychology, Max Planck Institute for Human Cognitive and Brain Sciences, P.O. Box 500355, 04303 Leipzig, Germany. hollaender@cbs.mpg.de
authors.forename: Antje
authors.initials: A
authors.lastname: Holländer
authors.forename: Christina
authors.initials: C
authors.lastname: Jung
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Prinz
mesh_terms: D000328:Adult; D002540:Cerebral Cortex / Q000502:physiology*; D003265:Contingent Negative Variation / Q000502:physiology*; D003299:Cooperative Behavior; D004569:Electroencephalography; D004576:Electromyography; D005260:Female; D006801:Humans; D007398:Interpersonal Relations; D008297:Male; D009043:Motor Activity; D009483:Neuropsychological Tests; D011930:Reaction Time / Q000502:physiology