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Dissociation of the neural correlates of implicit and explicit memory.

机译：隐式和显式记忆的神经相关性的解离。

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摘要

One presentation of a word to a subject is enough to change the way in which the word is processed subsequently, even when there is no conscious (explicit) memory of the original presentation. This phenomenon is known as implicit memory. The neural correlates of implicit memory have been studied previously, but they have never been compared with the correlates of explicit memory while holding task conditions constant or while using a procedure that ensured that the neural correlates were not 'contaminated' by explicit memory. Here we use scalp-recorded event-related brain potentials to identify neural activity associated with implicit and explicit memory during the performance of a recognition memory task. Relative to new words, recently studied words produced activity in three neuroanatomically and functionally dissociable neural populations. One of these populations was activated whether or not the word was consciously recognized, and its activity therefore represents a neural correlate of implicit memory. Thus, when task and memory contamination effects are eliminated, the neural correlates of explicit and implicit memory differ qualitatively.
机译：即使没有原始提示的有意识（显式）记忆，一个单词向主题的一个提示也足以改变后续处理该单词的方式。这种现象称为隐式内存。先前已经研究了隐式记忆的神经相关性，但从未将它们与显性记忆的相关性进行比较，而同时保持任务条件不变或使用确保神经相关性不受显式记忆“污染”的过程。在这里，我们使用头皮记录的事件相关的脑电势来识别与认知记忆任务执行过程中的隐式和显式记忆相关的神经活动。相对于新单词，最近研究的单词在三个神经解剖学和功能上可分离的神经群体中产生了活性。无论是否有意识地识别该单词，这些人群中的一个都会被激活，因此其活动代表了隐式记忆的神经相关性。因此，当消除任务和记忆污染的影响时，显式和隐式记忆的神经相关在质量上会有所不同。

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