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A dual mechanism underlying retroactive shifts of auditory spatial attention: dissociating target- and distractor-related modulations of alpha lateralization

Laura-Isabelle Klatt, Stephan Getzmann, Alexandra Begau, View ORCID ProfileDaniel Schneider
doi: https://doi.org/10.1101/2019.12.19.882324
Laura-Isabelle Klatt
Leibniz Research Centre for Working Environment and Human Factors
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  • For correspondence: klatt@ifado.de
Stephan Getzmann
Leibniz Research Centre for Working Environment and Human Factors
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Alexandra Begau
Leibniz Research Centre for Working Environment and Human Factors
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Daniel Schneider
Leibniz Research Centre for Working Environment and Human Factors
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Abstract

Attention can be allocated to mental representations to select information from working memory. To date, it remains ambiguous whether such retroactive shifts of attention involve the inhibition of irrelevant information or the prioritization of relevant information. Investigating asymmetries in posterior alpha-band oscillations during an auditory retroactive cueing task, we aimed at differentiating those mechanisms. Participants were cued to attend two out of three sounds in an upcoming sound array. Importantly, the resulting working memory representation contained one laterally and one centrally presented item. A centrally presented retro-cue then indicated the lateral, the central, or both items as further relevant for the task (comparing the cued item(s) to a memory probe). Time-frequency analysis revealed opposing patterns of alpha lateralization depending on target eccentricity: A contralateral decrease in alpha power in target lateral trials indicated the involvement of target prioritization. A contralateral increase in alpha power when the central item remained relevant (distractor lateral trials) suggested the de-prioritization of irrelevant information. No lateralization was observed when both items remained relevant, supporting the notion that auditory alpha lateralization is restricted to situations in which spatial information is task-relevant. Altogether, the data demonstrate that retroactive attentional deployment involves excitatory and inhibitory control mechanisms.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted December 20, 2019.
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A dual mechanism underlying retroactive shifts of auditory spatial attention: dissociating target- and distractor-related modulations of alpha lateralization
Laura-Isabelle Klatt, Stephan Getzmann, Alexandra Begau, Daniel Schneider
bioRxiv 2019.12.19.882324; doi: https://doi.org/10.1101/2019.12.19.882324
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A dual mechanism underlying retroactive shifts of auditory spatial attention: dissociating target- and distractor-related modulations of alpha lateralization
Laura-Isabelle Klatt, Stephan Getzmann, Alexandra Begau, Daniel Schneider
bioRxiv 2019.12.19.882324; doi: https://doi.org/10.1101/2019.12.19.882324

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