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  Temporal expectation modulates the cortical dynamics of short-term memory

Wilsch, A., Henry, M., Herrmann, B., Herrmann, C. S., & Obleser, J. (2018). Temporal expectation modulates the cortical dynamics of short-term memory. The Journal of Neuroscience, 38(34), 7428-7439. doi:10.1523/JNEUROSCI.2928-17.2018.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-0A06-D Version Permalink: http://hdl.handle.net/21.11116/0000-0003-B443-6
Genre: Journal Article

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 Creators:
Wilsch, Anna1, 2, Author              
Henry, Molly1, 3, Author              
Herrmann, Björn1, 3, Author              
Herrmann, Christoph S.2, Author
Obleser, Jonas1, 4, Author              
Affiliations:
1Max Planck Research Group Auditory Cognition, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_751545              
2Cluster of Excellence “Hearing4all”, Department of Psychology, Carl von Ossietzky University of Oldenburg, Germany, ou_persistent22              
3Department of Psychology, Brain and Mind Institute, University of Western Ontario, London, ON, Canada, ou_persistent22              
4Department of Psychology, University of Lübeck, Germany, ou_persistent22              

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Free keywords: Alpha; Attention; Magnetoencephalography; Neural oscillations; Sensory memory; Temporal expectations
 Abstract: Increased memory load is often signified by enhanced neural oscillatory power in the alpha range (8–13 Hz), which is taken to reflect inhibition of task-irrelevant brain regions. The corresponding neural correlates of memory decay, however, are not yet well understood. In the current study, we investigated auditory short-term memory decay in humans using a delayed matching-to-sample task with pure-tone sequences. First, in a behavioral experiment, we modeled memory performance over six different delay-phase durations. Second, in a MEG experiment, we assessed alpha-power modulations over three different delay-phase durations. In both experiments, the temporal expectation for the to-be-remembered sound was manipulated so that it was either temporally expected or not. In both studies, memory performance declined over time, but this decline was weaker when the onset time of the to-be-remembered sound was expected. Similarly, patterns of alpha power in and alpha-tuned connectivity between sensory cortices changed parametrically with delay duration (i.e., decrease in occipitoparietal regions, increase in temporal regions). Temporal expectation not only counteracted alpha-power decline in heteromodal brain areas (i.e., supramarginal gyrus), but also had a beneficial effect on memory decay, counteracting memory performance decline. Correspondingly, temporal expectation also boosted alpha connectivity within attention networks known to play an active role during memory maintenance. The present data show how patterns of alpha power orchestrate short-term memory decay and encourage a more nuanced perspective on alpha power across brain space and time beyond its inhibitory role.

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Language(s): eng - English
 Dates: 2018-07-092017-10-112018-07-102018-07-162018-08-22
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1523/JNEUROSCI.2928-17.2018
PMID: 30012685
Other: Epub 2018
 Degree: -

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Project name : -
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Funding program : Max Planck Research Group Grant
Funding organization : Max Planck Society

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Title: The Journal of Neuroscience
  Other : The Journal of Neuroscience: the Official Journal of the Society for Neuroscience
  Abbreviation : J. Neurosci.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Washington, DC : Society of Neuroscience
Pages: - Volume / Issue: 38 (34) Sequence Number: - Start / End Page: 7428 - 7439 Identifier: ISSN: 0270-6474
CoNE: https://pure.mpg.de/cone/journals/resource/954925502187_1