Prefrontally driven downregulation of neural synchrony mediates goal-directed forgetting

Hanslmayr, S. , Volberg, G., Wimber, M. , Oehler, N., Staudigl, T., Hartmann, T., Raabe, M., Greenlee, M. W. and Bäuml, K.-H. T. (2012) Prefrontally driven downregulation of neural synchrony mediates goal-directed forgetting. Journal of Neuroscience, 32(42), pp. 14742-14751. (doi: 10.1523/JNEUROSCI.1777-12.2012) (PMID:23077059) (PMCID:PMC6621432)

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Abstract

Neural synchronization between distant cell assemblies is crucial for the formation of new memories. To date, however, it remains unclear whether higher-order brain regions can adaptively regulate neural synchrony to control memory processing in humans. We explored this question in two experiments using a voluntary forgetting task. In the first experiment, we simultaneously recorded electroencephalography along with fMRI. The results show that a reduction in neural synchrony goes hand-in-hand with a BOLD signal increase in the left dorsolateral prefrontal cortex (dlPFC) when participants are cued to forget previously studied information. In the second experiment, we directly stimulated the left dlPFC with repetitive transcranial magnetic stimulation during the same task, and show that such stimulation specifically boosts the behavioral forgetting effect and induces a reduction in neural synchrony. These results suggest that prefrontally driven downregulation of long-range neural synchronization mediates goal-directed forgetting of long-term memories.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hanslmayr, Professor Simon and Wimber, Dr Maria
Authors: Hanslmayr, S., Volberg, G., Wimber, M., Oehler, N., Staudigl, T., Hartmann, T., Raabe, M., Greenlee, M. W., and Bäuml, K.-H. T.
College/School:College of Medical Veterinary and Life Sciences > Institute of Neuroscience and Psychology
Journal Name:Journal of Neuroscience
Publisher:Society for Neuroscience
ISSN:0270-6474
ISSN (Online):1529-2401

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