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Sensory and motor contents are prioritized dynamically in working memory
Irene Echeverria-Altuna1,2, Sage E P Boettcher1, Freek van Ede3
1Department of Experimental Psychology, University of Oxford, Oxford, United Kingdom.
Plos Biology
|July 14, 2025
Summary
Internal attention flexibly prioritizes sensory and motor information in working memory. However, these content types are prioritized independently, revealing distinct neural dynamics for guiding behavior.
Area of Science:
- Cognitive Neuroscience
- Neuroscience
- Psychology
Background:
- Internal selective attention guides prospective behavior by prioritizing sensory and motor information in working memory.
- Prior research indicates flexible, temporally tuned attention modulation of sensory content, but motor content dynamics remain unclear.
- The co-dependence of sensory and motor content modulation is largely uncharted, impacting understanding of working memory and attention.
Purpose of the Study:
- To investigate the flexible and temporally dynamic prioritization of sensory and motor working memory contents.
- To examine the degree of co-dependence between sensory and motor content modulation.
- To explore the neural mechanisms underlying internal attention for adaptive behavior.
Main Methods:
- Used electroencephalography (EEG) to track brain activity in human participants.
- Manipulated temporal expectations for item location (sensory) and associated action (motor).
- Analyzed posterior alpha (8-12 Hz) and central mu/beta (8-30 Hz) activity for contralateral vs. ipsilateral modulation.
Main Results:
- Confirmed flexible and temporally structured prioritization for both sensory and motor contents.
- Demonstrated that sensory and motor content prioritization are temporally uncoupled.
- Identified distinct neural modulations (alpha for sensory, mu/beta for motor) tracking prioritization.
Conclusions:
- Internal attention exhibits multiple, coordinated modulatory functions to prepare internal representations.
- Sensory and motor content prioritization operate independently, despite guiding the same prospective behavior.
- Findings advance understanding of the dynamic nature of working memory and internal attention mechanisms.
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