Extended self: medial prefrontal activity during transient association of self and objects.
Extended self: medial prefrontal activity during transient association of self and objects.
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DOI：
10.1093/scan/nsq096
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发表时间：
2012-02-01
影响因子：
4.2
通讯作者：
Johnson, Marcia K
中科院分区：
文献类型：
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作者：
Kim, Kyungmi;Johnson, Marcia K
“扩展自我”的概念是指将与个人相关的外部刺激纳入一个人的自我概念。目前的研究使用短暂的想象所有权范式来探索支持自我和物体之间关联的大脑区域。我们假设，自我和物体之间的偶然关联将通过大脑区域内侧前额叶皮层（MPFC）的激活来体现，该区域是在明确的自我参照处理中招募的。我们进一步预测，对自我相关物体的记忆优势和积极偏见将与 MPFC 的活动有关。正如预期的那样，与将物体分配给另一个人时相比，当物体被分配给参与者时，MPFC 显示出更大的激活。 MPFC 的活动还与卓越的后续源记忆以及对分配给自身的对象的偏好增加有关。这些发现为将自我相关的物体纳入扩展的自我提供了神经证据，这反过来又增加了它们的判断价值（纯粹的所有权效应）。
The idea of 'extended self' refers to the incorporation of personally relevant external stimuli into one's concept of self. The current study used a transient imagined ownership paradigm to explore brain regions that support the association between self and objects. We hypothesized that incidental associations between self and objects would be manifested by activation in a brain region, medial prefrontal cortex (MPFC), recruited in explicit self-referential processing. We further predicted that a memorial advantage for, and positivity-bias towards, self-relevant objects would be related to activity in MPFC. As anticipated, MPFC showed greater activation when objects were assigned to participants compared to when objects were assigned to another person. Activity in MPFC was also associated with superior subsequent source memory and increased preference for objects assigned to the self. These findings provide neural evidence for the incorporation of self-relevant objects into an extended self, which, in turn, increases their judged value (mere ownership effect).