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首页> 美国卫生研究院文献>Frontiers in Human Neuroscience >Listening for Recollection: A Multi-Voxel Pattern Analysis of Recognition Memory Retrieval Strategies
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Listening for Recollection: A Multi-Voxel Pattern Analysis of Recognition Memory Retrieval Strategies

机译：聆听回忆：识别记忆检索策略的多体素模式分析

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Recent studies of recognition memory indicate that subjects can strategically vary how much they rely on recollection of specific details vs. feelings of familiarity when making recognition judgments. One possible explanation of these results is that subjects can establish an internally directed attentional state (“listening for recollection”) that enhances retrieval of studied details; fluctuations in this attentional state over time should be associated with fluctuations in subjects’ recognition behavior. In this study, we used multi-voxel pattern analysis of fMRI data to identify brain regions that are involved in listening for recollection. We looked for brain regions that met the following criteria: (1) Distinct neural patterns should be present when subjects are instructed to rely on recollection vs. familiarity, and (2) fluctuations in these neural patterns should be related to recognition behavior in the manner predicted by dual-process theories of recognition: Specifically, the presence of the recollection pattern during the pre-stimulus interval (indicating that subjects are “listening for recollection” at that moment) should be associated with a selective decrease in false alarms to related lures. We found that pre-stimulus activity in the right supramarginal gyrus met all of these criteria, suggesting that this region proactively establishes an internally directed attentional state that fosters recollection. We also found other regions (e.g., left middle temporal gyrus) where the pattern of neural activity was related to subjects’ responding to related lures after stimulus onset (but not before), suggesting that these regions implement processes that are engaged in a reactive fashion to boost recollection.
机译：识别记忆的最新研究表明，受试者在做出识别判断时可以策略性地改变他们在多大程度上依赖于对特定细节的记忆与熟悉感。这些结果的一种可能解释是，受试者可以建立一种内部定向的注意力状态（“聆听回忆”），从而增强对研究细节的检索。这种注意力状态随时间的波动应与受试者识别行为的波动相关。在这项研究中，我们使用功能磁共振成像数据的多体素模式分析来识别参与聆听回忆的大脑区域。我们寻找满足以下条件的大脑区域：（1）当指示受试者依赖回忆与熟悉度时，应该存在明显的神经模式，（2）这些神经模式的波动应以这种方式与识别行为相关由双重识别过程理论预测：具体而言，在刺激前间隔内的回忆模式的存在（表明受试者当时正在“倾听回忆”）应与针对相关诱饵的虚假警报的选择性减少相关联。我们发现，右上颌上回的刺激前活动符合所有这些标准，这表明该区域主动建立了内部定向的注意力状态，促进了记忆。我们还发现了其他区域（例如，左中颞回），其中神经活动的模式与受试者在刺激发作后（而非之前）对相关诱饵的反应有关，表明这些区域以反应性方式参与了过程增加回忆。

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