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Understanding Intentions in Social Interaction: The Role of the Anterior Paracingulate Cortex

University Clinic of Ulm

Mauro Adenzato

Center for Cognitive Science, University of Turin

Angela Ciaramidaro

University Clinic of Ulm
Center for Cognitive Science, University of Turin

Ivan Enrici, Lorenzo Pia and Bruno G. Bara

Center for Cognitive Science, University of Turin

Neuroimaging studies have identified the anterior paracingulate cortex (PCC) as the key prefrontal region subserving theory of mind. We adopt an evolutionary perspective hypothesizing that, in response to the pressures of social complexity, a mechanism for manipulating information concerning social interaction has emerged in the anterior PCC. To date, neuroimaging studies have not properly distinguished between intentions of persons involved in social interactions and intentions of an isolated person. In two separate fMRI experiments, we demonstrated that the anterior PCC is not necessarily involved in the understanding of other people's intentions per se, but primarily in the understanding of the intentions of people involved in social interaction. Moreover, this brain region showed activation when a represented intention implies social interaction and therefore had not yet actually occurred. This result suggests that the anterior PCC is also involved in our ability to predict future intentional social interaction, based on an isolated agent's behavior. We conclude that distinct areas of the neural system underlying theory of mind are specialized in processing distinct classes of social stimuli.

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