The neural correlates of intentional and incidental self processing
The neural correlates of intentional and incidental self processing
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DOI：
10.1016/s0028-3932(01)00138-5
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发表时间：
2002-01-01
期刊：
影响因子：
2.6
通讯作者：
David, AS
中科院分区：
文献类型：
--
作者：
Kircher, TTJ;Brammer, M;David, AS
对“自我”的神经科学研究才刚刚开始出现。我们使用功能性磁共振成像（fMRI）来研究大脑激活，而受试者处理描述人格特质和身体特征的单词，在两个实验中，对比设计：偶然和故意。在第一个实验（有意的自我加工）中，被试呈现了人格特质形容词，并对他们的自我克制性（与非自我克制性）做出了判断。在第二个实验（附带的自我处理）中，受试者根据他们是否描述了身体和心理属性来对单词进行分类，而不知道这些单词是根据自我约束性排列成块的。受试者在扫描前6周对所有单词的自我独立性进行了评分。在两个实验中，自我描述的特质词的反应时间优势，这表明一个促进效应。两个实验中共同的激活区域包括左侧上级顶叶，外侧前额叶皮层的相邻区域在两个实验中也都很活跃。有意实验的左侧楔前叶和偶然实验的右侧颞中回出现不同的信号变化。结果表明，自我处理涉及不同的过程，可以发生在一个以上的认知水平与相应的功能神经解剖学相关的领域以前牵连在自己的状态的意识。(C)2002年由Elsevier Science Ltd.出版
The neuroscientific study of the 'Self' is just beginning to emerge. We used functional Magnetic Resonance Imaging (fMRI) to investigate cerebral activation while subjects processed words describing personality traits and physical features, in two experiments with contrasting designs: incidental and intentional. In the first experiment (intentional self processing), subjects were presented with personality trait adjectives and made judgements as to their self descriptiveness (versus non self descriptiveness). In the second experiment (incidental self processing), subjects categorised words according to whether they described physical versus psychological attributes, while unaware that the words had been arranged in blocks according to self descriptiveness. The subjects had previously rated all words for self descriptiveness 6 weeks prior to the scanning session. A reaction time advantage was present in both experiments for self descriptive trait words, suggesting a facilitation effect. Common areas of activation for the two experiments included the left superior parietal lobe, with adjacent regions of the lateral prefrontal cortex also active in both experiments. Differential signal changes were present in the left precuneus for the intentional and the right middle temporal gyrus for the incidental experiment. The results suggest that self processing involves distinct processes and can occur on more than one cognitive level with corresponding functional neuroanatomic correlates in areas previously implicated in the awareness of one's own state. (C) 2002 Published by Elsevier Science Ltd.