In search of the self: A positron emission tomography study
In search of the self: A positron emission tomography study
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DOI：
10.1111/1467-9280.00102
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发表时间：
1999-01-01
影响因子：
8.2
通讯作者：
Kapur, S
中科院分区：
文献类型：
--
作者：
Craik, FIM;Moroz, TM;Kapur, S
先前使用正电子发射断层扫描（PET）的工作表明，记忆编码过程与大脑左额叶区域的优先激活有关，而检索过程主要与右额叶激活有关。这种不对称性的一个可能原因是，情景提取必然涉及到对自我的引用;自我概念可能（至少部分）在右额叶区域中被表征。因此，本研究探讨了自我相关材料的编码也可能激活右额叶的可能性。八名右撇子志愿者在四种不同的PET扫描条件下判断特质形容词：（a）与自我的相关性（B）与知名公众人物的相关性，（c）社会期望，（d）音节数。结果表明，自我相关编码产生类似于与其他类型的语义编码相关的左额叶激活，但也在右额叶的特定激活。结论是自我概念既涉及一般图式结构，又涉及情景记忆提取的具体成分。
Previous work using positron emission tomography (PET) has shown that memory encoding processes are associated with preferential activation of left frontal regions of the brain, whereas retrieval processes are associated predominantly with right frontal activations. One possible reason for the asymmetry is that episodic retrieval necessarily involves reference to the self; and the self-concept may be represented (at least partially) In right frontal regions. Accordingly, the present study investigated the possibility that encoding of self-related material might also activate right frontal areas. Eight right-handed volunteers judged trait adjectives under four separate PET scan conditions: (a) relevance to self (b) relevance to a well-known public figure, (c) social desirability, and (d) number of syllables. The results showed that self-related encoding yielded left frontal activations similar to those associated with Other types of semantic encoding, but also specific activations in the right frontal lobe. It is concluded that the concept of self involves both general schematic structures and further specific components involved in episodic memory retrieval.