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Researchers tracked working memory representations in the brain

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Systems Neuroscience

Background:

  • Working memory is crucial for cognitive tasks.
  • The prefrontal cortex plays a key role in working memory.
  • Interhemispheric communication is vital for brain function.

Purpose of the Study:

  • To investigate how working memory representations are maintained and transferred between brain hemispheres.
  • To understand the neural mechanisms underlying interhemispheric cooperation in working memory.

Main Methods:

  • Real-time tracking of neural activity in the prefrontal cortex of both hemispheres.
  • Utilizing saccade eye movements to shift remembered locations between visual hemifields.
  • Analyzing local neural rhythms and their synchronization across hemispheres.

Main Results:

  • Working memory representations were dynamically tracked in real time.
  • A "soft handover" mechanism was identified for transferring information between hemispheres.
  • Local neural rhythms and their interhemispheric synchronization were found to subserve this handover.

Conclusions:

  • The prefrontal cortex facilitates a flexible, coordinated working memory system across both hemispheres.
  • Neural oscillations and their synchronization are key to seamless interhemispheric information transfer.
  • This provides new insights into the neural basis of spatial working memory.