Posterior parietal cortex and episodic encoding: insights from fMRI subsequent memory effects and dual-attention theory.
Posterior parietal cortex and episodic encoding: insights from fMRI subsequent memory effects and dual-attention theory.
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DOI：
10.1016/j.nlm.2008.10.011
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发表时间：
2009-02
影响因子：
2.7
通讯作者：
Wagner, Anthony D.
中科院分区：
文献类型：
--
作者：
Uncapher, Melina R.;Wagner, Anthony D.
关键词：
情景记忆——对生活事件的记忆——的形成受到事件处理过程中注意力的影响。一种领先的注意力神经生物学模型假设了两个独立但相互作用的系统，它们依赖于外侧后顶叶皮层（PPC）的不同区域。从这种双重注意力的角度来看，背侧 PPC 被认为支持目标导向的注意力分配，而腹侧 PPC 被认为支持反射性定向到自动捕获注意力的信息。为了加深对顶叶机制如何影响事件编码的理解，我们回顾了功能性 MRI 研究，这些研究记录了编码过程中横向 PPC 激活与随后的记忆表现（例如，后来的记忆或遗忘）之间的关系。本综述表明，(a) 在人类外侧 PPC 中经常观察到编码相关活动，(b) 背侧 PPC 激活增加与后来的记忆成功相关，(c) 腹侧 PPC 激活增加主要与后来的记忆失败相关。从双重注意力的角度来看，这些发现表明，在事件处理过程中分配目标导向的注意力会增加事件随后被记住的可能性，而在事件处理过程中捕获反射性注意力可能会对事件编码产生负面影响。顶叶皮质中编码相关激活的普遍性表明情景记忆的神经生物学模型应该考虑顶叶介导的注意力机制如何调节编码。
The formation of episodic memories –– memories for life events –– is affected by attention during event processing. A leading neurobiological model of attention posits two separate yet interacting systems that depend on distinct regions in lateral posterior parietal cortex (PPC). From this dual-attention perspective, dorsal PPC is thought to support the goal-directed allocation of attention, whereas ventral PPC is thought to support reflexive orienting to information that automatically captures attention. To advance understanding of how parietal mechanisms may impact event encoding, we review functional MRI studies that document the relationship between lateral PPC activation during encoding and subsequent memory performance (e.g., later remembering or forgetting). This review reveals that (a) encoding-related activity is frequently observed in human lateral PPC, (b) increased activation in dorsal PPC is associated with later memory success, and (c) increased activation in ventral PPC predominantly correlates with later memory failure. From a dual-attention perspective, these findings suggest that allocating goal-directed attention during event processing increases the probability that the event will be remembered later, whereas the capture of reflexive attention during event processing may have negative consequences for event encoding. The prevalence of encoding-related activation in parietal cortex suggests that neurobiological models of episodic memory should consider how parietal-mediated attentional mechanisms regulate encoding.
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影响因子：
4.1
作者：
BADDELEY, A;LEWIS, V;THOMSON, N
通讯作者：
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影响因子：
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DOI：
10.1073/pnas.162356599
发表时间：
2002-08-06
影响因子：
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通讯作者：
Gabrieli, JDE
DOI：
10.1073/pnas.93.15.8016
发表时间：
1996-07-23
影响因子：
11.1
作者：
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