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  Attentional orienting to mnemonic representations: Reduction of load-sensitive maintenance-related activity in the intraparietal sulcus

Trapp, S., & Lepsien, J. (2012). Attentional orienting to mnemonic representations: Reduction of load-sensitive maintenance-related activity in the intraparietal sulcus. Neuropsychologia, 50(12), 2805-2811. doi:10.1016/j.neuropsychologia.2012.08.003.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0010-15B8-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-CDB4-B
Genre: Journal Article

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Trapp_2012_Attentional.pdf (Publisher version), 831KB
 
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 Creators:
Trapp, Sabrina1, Author              
Lepsien, Joeran2, Author              
Affiliations:
1Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634549              
2Methods and Development Unit Nuclear Magnetic Resonance, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634558              

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Free keywords: Attention; Visual working memory; Load; Intraparietal sulcus; Storage; Rehearsal
 Abstract: The orienting of attention to internal or mnemonic representations held in visual working memory (VWM) has recently become a field of increasing interest. While a number of studies support the hypothesis that attention to selected representations in VWM reduces memory load, conclusive findings are still missing. In this event-related functional magnetic resonance imaging (fMRI) study, we directly investigated whether attentional orienting to mnemonic representations reduces activity in VWM storage-related areas of the brain. VWM load was manipulated by asking subjects to memorize two, four or six items. A retro-cue during the subsequent delay period asked subjects to attend to just one of these items for a subsequent test. This was compared to trials where subjects were required to continue attending to all items for the subsequent test. Data show reduction of load-sensitive maintenance-related activity along the right intraparietal sulcus (IPS), directly linked to attentional orienting. While activity in the anterior IPS reflected the number of representations in the focus of attention, the activation pattern in the posterior IPS suggested residual activation related to unattended items. This dissociation is in line with a functional subdivision of the right IPS according to attentional and mnemonic properties.

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Language(s): eng - English
 Dates: 2012-08-042012-08-132012-10
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.neuropsychologia.2012.08.003
PMID: 22960415
Other: Epub 2012
 Degree: -

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Title: Neuropsychologia
Source Genre: Journal
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Publ. Info: Oxford : Pergamon
Pages: - Volume / Issue: 50 (12) Sequence Number: - Start / End Page: 2805 - 2811 Identifier: ISSN: 0028-3932
CoNE: https://pure.mpg.de/cone/journals/resource/954925428258