Cerebral Cortex Advance Access originally published online on July 31, 2006
Cerebral Cortex 2007 17(6):1335-1341; doi:10.1093/cercor/bhl044
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When Remembering Causes Forgetting: Electrophysiological Correlates of Retrieval-Induced Forgetting
1 Department of Psychology, Lund University, Lund, Sweden, 2 Experimental Neuropsychology Unit, Department of Psychology, Saarland University, Saarbrücken, Germany, 3 Department of Psychology, Regensburg University, Regensburg, Germany
Address correspondence to Mikael Johansson, Department of Psychology, Lund University, Box 213, SE-22100 Lund, Sweden. Email: mikael.johansson{at}psychology.lu.se.
People tend to forget information that is related to memories they are actively trying to retrieve. On the basis of results from behavioral studies, such retrieval-induced forgetting is held to result from inhibitory control processes that are recruited to attenuate interference caused by competing memory traces. Employing electrophysiological measures of brain activity, the present study examined the neural correlates of these inhibitory processes as they operate. The results demonstrate that sustained prefrontal event-related potentials were 1) related to whether or not selective memory retrieval was required during reprocessing of previously studied words and 2) predictive of individual differences in the amount of forgetting observed in an ensuing recall test. The present findings give support to an inhibitory control account of retrieval-induced forgetting and are in accord with the view that prefrontal regions play an important role in the selection and maintenance of relevant memory representations at the expense of those currently irrelevant.
Key Words: cognitive control episodic memory ERP inhibition prefrontal cortex
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