Related Experiment Video
Updated: May 30, 2025
05:55
Modeling the Functional Network for Spatial Navigation in the Human Brain
Published on: October 13, 2023
984
Redundant prefrontal hemispheres adapt storage strategy to working memory demands
Melanie Tschiersch1,2, Akash Umakantha3,4, Ryan C Williamson3,4
1IDIBAPS, Barcelona, Spain.
Biorxiv : the Preprint Server for Biology
|January 27, 2025
Summary
The prefrontal hemispheres work together in a redundant yet adaptable way to support spatial working memory (WM). This architecture allows for flexibility, improving performance in simple tasks and enabling specialization in complex ones.
Area of Science:
- Neuroscience
- Cognitive Science
- Computational Neuroscience
Background:
- The coordination of prefrontal hemispheres in spatial working memory (WM) is not fully understood.
- Two competing models exist: a specialized contralateral model and a redundant bilateral model.
Purpose of the Study:
- To investigate how prefrontal hemispheres coordinate during spatial WM tasks.
- To differentiate between specialized and redundant models of hemispheric function in WM.
Main Methods:
- Simultaneous bilateral prefrontal cortex recordings in macaque monkeys during a visuo-spatial WM task.
- Analysis of neural representations and behavioral imprecision.
- Attractor model simulations to test hemispheric coupling effects.
Main Results:
- Each prefrontal hemisphere represented targets across the entire visual field.
- Hemispheres equally predicted behavioral imprecisions in spatial WM.
- Memory errors showed weak correlations between hemispheres.
- Simulations indicated redundancy enhances simple task precision, while weak coupling allows specialization in complex tasks.
Conclusions:
- Redundant, weakly coupled prefrontal hemispheres support spatial working memory.
- This interhemispheric architecture is versatile, adapting to varying cognitive demands.
- A unified model reconciles previous findings supporting distinct hemispheric specialization or redundancy.
Keywords:
attractor networksbilateral field advantagemulti-area recordingsprefrontal cortexserial dependenceworking memoryMore Related Videos
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