Understanding metamemory: Neural correlates of the cognitive process and subjective level of confidence in recognition memory
Understanding metamemory: Neural correlates of the cognitive process and subjective level of confidence in recognition memory
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DOI：
10.1016/j.neuroimage.2005.09.058
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发表时间：
2006-02-15
期刊：
影响因子：
5.7
通讯作者：
Sperling, RA
中科院分区：
文献类型：
--
作者：
Chua, EF;Schacter, DL;Sperling, RA
人类记忆的一个基本特征是评估自己记忆表现信心的能力，但确定记忆表现信心的过程背后的神经机制尚未被分离出来。使用功能性磁共振成像，我们研究了置信度评估过程和在此过程中表达的高或低置信度的主观水平。置信度评估与识别的比较显示，在内侧和外侧顶叶区域的置信度评估期间，相对激活更大，这通常在认知任务期间失活，先前被描述为“默认网络”的一部分。此外，高与低置信度判断的比较显示，海马、扣带和其他边缘系统区域的神经活动受到调制，这些区域以前被描述为帕佩兹回路。我们的研究结果表明，在两个不同的网络的大脑区域的活动有助于通过记忆监测过程和信号主观的信心水平识别记忆的主观经验“知道你知道”。(c)2005年爱思唯尔公司All rights reserved.
An essential feature of human memory is the capacity to assess confidence in one's own memory performance, but the neural mechanisms underlying the process of determining confidence in memory performance have not yet been isolated. Using functional magnetic resonance imaging, we examined both the process of confidence assessment and the subjective level of high or low confidence expressed during this process. The comparison of confidence assessment to recognition showed greater relative activation during confidence assessment in medial and lateral parietal regions, which typically deactivate during cognitive tasks, previously described as part of the "default network". Furthermore, comparisons of high versus low confidence judgments revealed modulation of neural activity in the hippocampus, cingulate and other limbic regions, previously described as the Circuit of Papez. Our findings suggest that activity in two distinct networks of brain regions contribute to the subjective experience of "knowing you know" through memory monitoring processes and signaling subjective confidence level for recognition memory. (c) 2005 Elsevier Inc. All rights reserved.