The ERP correlates of self-knowledge in ageing.
The ERP correlates of self-knowledge in ageing.
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DOI：
10.3758/s13421-021-01225-7
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发表时间：
2022-04
影响因子：
2.4
通讯作者：
Renoult L
中科院分区：
文献类型：
--
作者：
Tanguay AFN;Johnen AK;Markostamou I;Lambert R;Rudrum M;Davidson PSR;Renoult L
自我知识是一种个人语义知识，涉及一个人的自我形象和个人身份。它最常被操作化为一个人性格特征的总结（“我是一个固执的人”）。有趣的是，最近的研究表明，在年轻人中，自我知识的神经关联可以与一般语义记忆和情景记忆的神经关联区分开来。然而，关于衰老过程中神经表征“去分化”或独特性丧失的研究表明，在老年人中，自我知识的神经关联可能与语义记忆和情景记忆的神经关联区分度较小。我们在一项事件相关电位（ERP）研究中对28名年轻人和26名老年人进行了调查，当他们对人格特征进行自身相关性分类（自我知识条件）以及与某些人群的相关性分类（一般语义条件）时。然后参与者对之前看到的特征进行识别测试（情景条件）。与情景回忆过程相关的晚期正成分（LPC）的振幅在年轻人中区分了自我知识、一般语义和情景条件，但在老年人中没有。然而，在老年人中，综合情景记忆分数较高的参与者在不同实验条件下的LPC振幅区分度更大。此外，与年龄相关的神经去分化可能具有物质和区域特异性这一事实一致，在两个年龄组中，与语义加工相关的N400成分在记忆类型之间观察到一些差异。综上所述，这些发现表明，陈述性记忆亚型在衰老过程中区分度较小，但区分程度随情景记忆功能而变化。
Self-knowledge is a type of personal semantic knowledge that concerns one’s self-image and personal identity. It has most often been operationalized as the summary of one’s personality traits (“I am a stubborn person”). Interestingly, recent studies have revealed that the neural correlates of self-knowledge can be dissociated from those of general semantic and episodic memory in young adults. However, studies of “dedifferentiation” or loss of distinctiveness of neural representations in ageing suggest that the neural correlates of self-knowledge might be less distinct from those of semantic and episodic memory in older adults. We investigated this question in an event-related potential (ERP) study with 28 young and 26 older adults while they categorised personality traits for their self-relevance (self-knowledge conditions), and their relevance to certain groups of people (general semantic condition). Participants then performed a recognition test for previously seen traits (episodic condition). The amplitude of the late positive component (LPC), associated with episodic recollection processes, differentiated the self-knowledge, general semantic, and episodic conditions in young adults, but not in older adults. However, in older adults, participants with higher composite episodic memory scores had more differentiated LPC amplitudes across experimental conditions. Moreover, consistent with the fact that age-related neural dedifferentiation may be material and region specific, in both age groups some differences between memory types were observed for the N400 component, associated with semantic processing. Taken together, these findings suggest that declarative memory subtypes are less distinct in ageing, but that the amount of differentiation varies with episodic memory function.
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DOI：
10.1016/0013-4694(96)95049-x
发表时间：
1996-09-01
期刊：
ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY
影响因子：
--
作者：
Ford, JM;Woodward, SH;Roth, WT
通讯作者：
Roth, WT
影响因子：
3.4
作者：
D'Argembeau, Arnaud;Demblon, Julie
通讯作者：
Demblon, Julie
影响因子：
2.9
作者：
Davidson, Patrick S. R.;Glisky, Elizabeth L.
通讯作者：
Glisky, Elizabeth L.
影响因子：
3.7
作者：
Federmeier, KD;Kutas, M
通讯作者：
Kutas, M
影响因子：
2.1
作者：
Acevedo-Molina, Monica C.;Matijevic, Stephanie;Grilli, Matthew D.
通讯作者：
Grilli, Matthew D.