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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Parietal cortex and representation of the mental self
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Parietal cortex and representation of the mental self

机译：顶叶皮层和心理自我的表征

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For a coherent and meaningful life, conscious self-representation is mandatory. Such explicit "autonoetic consciousness" is thought to emerge by retrieval of memory of personally experienced events ("episodic memory"). During episodic retrieval, functional imaging studies consistently show differential activity in medial prefrontal and medial parietal cortices. With positron-emission tomography, we here show that these medial regions are functionally connected and interact with lateral regions that are activated according to the degree of self-reference. During retrieval of previous judgments of Oneself, Best Friend, and the Danish Queen, activation increased in the left lateral temporal cortex and decreased in the right inferior parietal region with decreasing self-reference. Functionally, the former region was preferentially connected to medial prefrontal cortex, the latter to medial parietal. The medial parietal region may, then, be conceived of as a nodal structure in self-representation, functionally connected to both the right parietal and the medial prefrontal cortices. To determine whether medial parietal cortex in this network is essential for episodic memory retrieval with self-representation, we used transcranial magnetic stimulation over the region to transiently disturb neuronal circuitry. There was a decrease in the efficiency of retrieval of previous judgment of mental Self compared with retrieval of judgment of Other with transcranial magnetic stimulation at a latency of 160 ms, confirming the hypothesis. This network is strikingly similar to the network of the resting conscious state, suggesting that self-monitoring is a core function in resting consciousness.
机译：对于连贯而有意义的生活，有意识的自我表现是强制性的。这种明确的“自主意识”被认为是通过对个人经历事件的记忆（“事件记忆”）的检索而出现的。在情节检索过程中，功能影像学研究始终显示内侧前额叶和内侧顶叶皮层活动的差异。使用正电子发射断层扫描，我们在这里显示这些内侧区域在功能上连接并与根据自参考程度激活的外侧区域相互作用。在取回对自己，最好的朋友和丹麦女王的先前判断期间，随着自我参照的减少，激活在左侧颞皮层增加而在右下顶叶区域减少。在功能上，前者区域优先连接至内侧前额叶皮层，后者优先连接至内侧顶叶。然后，可以将顶壁内侧区域视为自我表现的淋巴结结构，其功能性连接到右顶壁和内侧前额叶皮层。为了确定此网络中的内侧顶叶皮层是否对具有自我表现的情节性记忆检索必不可少，我们在该区域使用了经颅磁刺激来暂时干扰神经元电路。与经颅磁刺激以160 ms的潜伏期进行的“他人”的先前判断的检索效率相比，“他人”的先前判断的检索效率有所下降，从而证实了这一假设。该网络与静息意识状态的网络极为相似，表明自我监控是静息意识的核心功能。

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