Involvement of the anterior cingulate cortex in time-based prospective memory task monitoring: an EEG analysis of brain sources using independent component and measure projection analysis
Author
dc.contributor.author
Cruz San Martín, Gabriela Paz
Author
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Burgos Concha, Pablo
Author
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Kilborn, Kerry
Author
dc.contributor.author
Evans, Jonathan J.
Admission date
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2018-07-12T16:30:09Z
Available date
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2018-07-12T16:30:09Z
Publication date
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2017
Cita de ítem
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Plos One 12(9): e0184037
es_ES
Identifier
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10.1371/journal.pone.0184037
Identifier
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https://repositorio.uchile.cl/handle/2250/149787
Abstract
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Objective
Time-based prospective memory (PM), remembering to do something at a particular moment in the future, is considered to depend upon self-initiated strategic monitoring, involving a retrieval mode (sustained maintenance of the intention) plus target checking (intermittent time checks). The present experiment was designed to explore what brain regions and brain activity are associated with these components of strategic monitoring in time-based PM tasks.
Method
24 participants were asked to reset a clock every four minutes, while performing a foreground ongoing word categorisation task. EEG activity was recorded and data were decomposed into source-resolved activity using Independent Component Analysis. Common brain regions across participants, associated with retrieval mode and target checking, were found using Measure Projection Analysis.
Results
Participants decreased their performance on the ongoing task when concurrently performed with the time-based PM task, reflecting an active retrieval mode that relied on withdrawal of limited resources from the ongoing task. Brain activity, with its source in or near the anterior cingulate cortex (ACC), showed changes associated with an active retrieval mode including greater negative ERP deflections, decreased theta synchronization, and increased alpha suppression for events locked to the ongoing task while maintaining a time-based intention. Activity in the ACC was also associated with time-checks and found consistently across participants; however, we did not find an association with time perception processing per se.
Conclusion
The involvement of the ACC in both aspects of time-based PM monitoring may be related to different functions that have been attributed to it: strategic control of attention during the retrieval mode (distributing attentional resources between the ongoing task and the time-based task) and anticipatory/decision making processing associated with clock-checks.
es_ES
Patrocinador
dc.description.sponsorship
Comision Nacional de Investigacion Ciencia y Tecnologia (CONICYT)
Chilean National Commission of Scientific and Technological Research (CONICYT)
Swartz Centre for Computational Neuroscience (SCCN), UCSD
Involvement of the anterior cingulate cortex in time-based prospective memory task monitoring: an EEG analysis of brain sources using independent component and measure projection analysis