Anticipatory Signatures of Voluntary Memory Suppression
Anticipatory Signatures of Voluntary Memory Suppression
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DOI：
10.1523/jneurosci.4703-08.2009
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发表时间：
2009-03-04
影响因子：
5.3
通讯作者：
Baeuml, Karl-Heinz
中科院分区：
文献类型：
--
作者：
Hanslmayr, Simon;Leipold, Philipp;Baeuml, Karl-Heinz
自愿记忆抑制可以阻止不想要的记忆进入意识，导致后来对信息的遗忘。在本研究中，我们寻找存在的预期过程，调解这种自愿记忆抑制。使用思考/不思考范式，受试者收到一个提示，是否准备思考之前研究过的线索-目标对，或者是否不让之前研究过的线索-目标对进入意识。通过检测事件相关电位，我们确定了自愿记忆抑制的两个电生理过程：(1)在提供待抑制记忆的记忆线索之前，一个早期预期过程运行；(2)在记忆线索呈现后，一个后期过程运行。这两种ERP效应都是由于右额叶和左顶叶积极性下降所致。它们是正相关的，预示着后来的遗忘。结果表明，预期过程的存在，调解自愿记忆抑制。
Voluntary memory suppression can keep unwanted memories from entering consciousness, inducing later forgetting of the information. In the present study, we searched for the existence of anticipatory processes, mediating such voluntary memory suppression. Using the think/no-think paradigm, subjects received a cue whether to prepare to think of a previously studied cue-target pair or whether to not let a previously studied cue-target pair enter consciousness. Examining event-related potentials, we identified two electrophysiological processes of voluntary memory suppression: (1) an early anticipatory process operating before the memory cue for a to-be-suppressed memory was provided, and (2) a later process operating after memory cue presentation. Both ERP effects were due to a decreased right frontal and left parietal positivity. They were positively related and predicted later forgetting. The results point to the existence of anticipatory processes, mediating voluntary memory suppression.