Fixed and flexible: Dynamic prefrontal activations and working memory capacity relationships vary with memory demand Article Swipe
Ashti M. Shah
,
Hannah Grotzinger
,
Jakub Kaczmarzyk
,
Lindsey J. Powell
,
Meryem A. Yücel
,
John D. E. Gabrieli
,
Nicholas A. Hubbard
·
YOU?
·
· 2019
· Open Access
·
· DOI: https://doi.org/10.1080/17588928.2019.1694500
YOU?
·
· 2019
· Open Access
·
· DOI: https://doi.org/10.1080/17588928.2019.1694500
Prefrontal cortex (PFC) activation during encoding of memoranda (proactive responses) is associated with better working memory (WM) compared to reactive/retrieval-based activation. This suggests that dynamic PFC activation patterns may be fixed, based upon one's WM ability, with individuals who have greater WM ability relying more on proactive processes and individuals with lesser WM ability relying more on reactive processes. We newly tested whether this heuristic applied when challenging an individual's WM capacity. Twenty-two participants (N = 22) underwent functional near-infrared spectroscopy (fNIRS) during a modified Sternberg WM paradigm. We tested whether the relationship between dynamic PFC activation patterns and WM capacity changed, as a function of WM demands (N = 14 after quality control). Here, higher-WM capacity was associated with more proactive PFC patterns, but only when WM capacity was overloaded. Lower-WM capacity was associated with these same patterns, but only when WM demand was low. Findings are inconsistent with a purely fixed view of dynamic PFC activation patterns and suggest higher- and lower-WM-capacity individuals flexibly engage PFC processes in a fundamentally different manner, dependent upon current WM demands.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1080/17588928.2019.1694500
- OA Status
- green
- Cited By
- 6
- References
- 25
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W2990055081
All OpenAlex metadata
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https://openalex.org/W2990055081Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1080/17588928.2019.1694500Digital Object Identifier
- Title
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Fixed and flexible: Dynamic prefrontal activations and working memory capacity relationships vary with memory demandWork title
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2019Year of publication
- Publication date
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2019-11-29Full publication date if available
- Authors
-
Ashti M. Shah, Hannah Grotzinger, Jakub Kaczmarzyk, Lindsey J. Powell, Meryem A. Yücel, John D. E. Gabrieli, Nicholas A. HubbardList of authors in order
- Landing page
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https://doi.org/10.1080/17588928.2019.1694500Publisher landing page
- Open access
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YesWhether a free full text is available
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greenOpen access status per OpenAlex
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https://www.ncbi.nlm.nih.gov/pmc/articles/7255920Direct OA link when available
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Working memory, Psychology, Prefrontal cortex, Neuroscience, Cognitive psychology, CognitionTop concepts (fields/topics) attached by OpenAlex
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6Total citation count in OpenAlex
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2024: 2, 2021: 2, 2020: 1, 2017: 1Per-year citation counts (last 5 years)
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10Other works algorithmically related by OpenAlex
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