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The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
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Subspace partitioning in the human prefrontal cortex resolves cognitive interference.

Jan Weber1,2, Gabriela Iwama1,2, Anne-Kristin Solbakk3,4,5,6

  • 1Hertie Institute for Clinical Brain Research, Center for Neurology, University Medical Center Tübingen, 72076 Tübingen, Germany.

Proceedings of the National Academy of Sciences of the United States of America
|July 3, 2023
PubMed
Summary
This summary is machine-generated.

Brain mechanisms for flexible cognitive control involve resolving interference in the prefrontal cortex (PFC). Neural coding partitions task information, reducing behavioral switch costs and enabling adaptable decision-making.

Keywords:
cognitive controlintracranial EEGpopulation geometryprefrontal cortex

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Computational Neuroscience

Background:

  • Flexible cognitive control is crucial for adapting behavior.
  • The human prefrontal cortex (PFC) is key to cognitive control.
  • How the brain manages multiple task variables without interference is unclear.

Purpose of the Study:

  • Investigate neural mechanisms of cognitive control in the human PFC.
  • Understand how the brain encodes multiple task variables simultaneously.
  • Determine how interference between task-relevant and irrelevant features is minimized.

Main Methods:

  • Utilized intracranial recordings from the human PFC.
  • Analyzed neural population activity during task performance.
  • Quantified behavioral switch costs associated with task changes.

Main Results:

  • Competition between past and present task representations in the PFC causes behavioral switch costs.
  • Coding partitioning into distinct low-dimensional neural states resolves this interference.
  • This neural mechanism significantly attenuates behavioral switch costs.

Conclusions:

  • The PFC employs coding partitioning to manage competing neural representations.
  • This mechanism is fundamental for flexible cognitive control.
  • Findings reveal how the brain achieves adaptive behavior by minimizing interference.