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  Alpha oscillatory dynamics index temporal expectation benefits in working memory

Wilsch, A., Henry, M., Herrmann, B., Maess, B., & Obleser, J. (2015). Alpha oscillatory dynamics index temporal expectation benefits in working memory. Cerebral Cortex, 25(7), 1938-1946. doi:10.1093/cercor/bhu004.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-1C8B-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-1502-3
Genre: Journal Article

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 Creators:
Wilsch, Anna1, Author              
Henry, Molly1, Author              
Herrmann, Björn1, Author              
Maess, Burkhard2, Author              
Obleser, Jonas1, Author              
Affiliations:
1Max Planck Research Group Auditory Cognition, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_751545              
2Methods and Development Group MEG and EEG - Cortical Networks and Cognitive Functions, MPI for Human Cognitive and Brain Sciences, Max Planck Society, Leipzig, DE, ou_2205650              

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Free keywords: Alpha oscillations; Magnetoencephalography; Speech in noise; Temporal expectations; Working memory
 Abstract: Enhanced alpha power compared with a baseline can reflect states of increased cognitive load, for example, when listening to speech in noise. Can knowledge about “when” to listen (temporal expectations) potentially counteract cognitive load and concomitantly reduce alpha? The current magnetoencephalography (MEG) experiment induced cognitive load using an auditory delayed-matching-to-sample task with 2 syllables S1 and S2 presented in speech-shaped noise. Temporal expectation about the occurrence of S1 was manipulated in 3 different cue conditions: “Neutral” (uninformative about foreperiod), “early-cued” (short foreperiod), and “late-cued” (long foreperiod). Alpha power throughout the trial was highest when the cue was uninformative about the onset time of S1 (neutral) and lowest for the late-cued condition. This alpha-reducing effect of late compared with neutral cues was most evident during memory retention in noise and originated primarily in the right insula. Moreover, individual alpha effects during retention accounted best for observed individual performance differences between late-cued and neutral conditions, indicating a tradeoff between allocation of neural resources and the benefits drawn from temporal cues. Overall, the results indicate that temporal expectations can facilitate the encoding of speech in noise, and concomitantly reduce neural markers of cognitive load.

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Language(s): eng - English
 Dates: 2014-01-312015-07-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1093/cercor/bhu004
PMID: 24488943
Other: Epub 2014
 Degree: -

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Title: Cerebral Cortex
Source Genre: Journal
 Creator(s):
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Publ. Info: -
Pages: - Volume / Issue: 25 (7) Sequence Number: - Start / End Page: 1938 - 1946 Identifier: ISSN: 1047-3211
CoNE: /journals/resource/954925592440