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Dissociable Codes in Motor Working Memory
Hanna Hillman1, Tabea Botthof1, Alexander D Forrence1
1Department of Psychology, Yale University.
Psychological Science
|January 18, 2024
Summary
Motor working memory (MWM) stores recent movement details. A new model reveals MWM uses both abstract and effector-specific codes, with the latter vulnerable to interference, impacting skill learning.
Area of Science:
- Cognitive Neuroscience
- Motor Control
- Human Movement Science
Background:
- Working memory is extensively studied in sensory domains, but less so for motor information.
- Motor working memory (MWM) is crucial for immediate behavioral control and skill acquisition.
Purpose of the Study:
- To investigate the nature of motor working memory (MWM).
- To examine how MWM is affected by cognitive load, delays, and interference.
Main Methods:
- Participants performed tasks requiring encoding and recall of reaching movements.
- Three experiments manipulated cognitive load, delay intervals, and interfering movements.
Main Results:
- MWM involves an abstract code transferable across effectors and an effector-specific code.
- Interfering movements, even irrelevant ones, impaired the effector-specific code.
- Visuospatial working memory load did not affect MWM codes.
Conclusions:
- The findings support a dual-code model of MWM.
- MWM shares computational principles with other working memory systems.
- Understanding MWM is key for behavioral control and motor learning research.
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