title: The neural basis of social tactics: An fMRI study.
abstract: One of the most powerful ways of succeeding in complex social interactions is to read the minds of companions and stay a step ahead of them. In order to assess neural responses to reciprocal mind reading in socially strained human relationships, we used a 3-T scanner to perform an event-related functional magnetic resonance imaging study in 16 healthy subjects who participated in the game of Chicken. Statistical parametric mapping showed that the counterpart effect (human minus computer) exclusively activated the medial frontal area corresponding to the anterior paracingulate cortex (PCC) and the supramarginal gyrus neighboring the posterior superior temporal sulcus (STS). Furthermore, when we analyzed the data to evaluate whether the subjects made risky/aggressive or safe/reconciliatory choices, the posterior STS showed that the counterpart had a reliable effect regardless of risky or safe decisions. In contrast, a significant opponent x selection interaction was revealed in the anterior PCC. Based on our findings, it could be inferred that the posterior STS and the anterior PCC play differential roles in mentalizing; the former serves as a general mechanism for mentalizing, while the latter is exclusively involved in socially risky decisions.
authors: Department of Neuropsychiatry, Kyoto University Graduate School of Medicine, Shogoin-Kawaharacho 54, Kyoto 606, Japan. xhirokix@kuhp.kyoto-u.ac.jp
authors: Hiroki
authors: H
authors: Fukui
authors: Toshiya
authors: T
authors: Murai
authors: Jun
authors: J
authors: Shinozaki
authors: Toshihiko
authors: T
authors: Aso
authors: Hidenao
authors: H
authors: Fukuyama
authors: Takuji
authors: T
authors: Hayashi
authors: Takashi
authors: T
authors: Hanakawa