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Different states of priority recruit different neural representations in visual working memory
Qing Yu1, Chunyue Teng1, Bradley R Postle1,2
1Department of Psychiatry, University of Wisconsin-Madison, Madison, Wisconsin, United States of America.
Plos Biology
|June 30, 2020
Summary
This study reveals how the brain prioritizes information in working memory. Using functional magnetic resonance imaging (fMRI), researchers found distinct neural representations for prioritized and unprioritized items, suggesting a common remapping mechanism.
Area of Science:
- Cognitive Neuroscience
- Neuroimaging
Background:
- Working memory is crucial for cognitive tasks.
- Understanding how the brain prioritizes information is key to cognitive function.
Purpose of the Study:
- To investigate the neural codes for prioritized and unprioritized information in working memory.
- To explore the role of neural remapping in working memory priority.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was employed.
- Inverted encoding models (IEMs) were used to decode neural representations.
- Participants performed a delayed recall task with prioritized and unprioritized memory items.
Main Results:
- In early visual cortex, orientation representations of unprioritized memory items were rotated relative to prioritized items.
- In the intraparietal sulcus (IPS), location representations of unprioritized memory items showed analogous rotation.
- These findings suggest a common neural remapping mechanism for priority-based representation.
Conclusions:
- A common neural remapping mechanism underlies the representation of stimulus identity and context at different priority levels in working memory.
- This mechanism may be crucial for efficient information processing and selection in working memory.
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