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Functional Alignment with Anatomical Networks is Associated with Cognitive Flexibility.

John D Medaglia1,2, Weiyu Huang3, Elisabeth A Karuza4

  • 1Department of Psychology, Drexel University, Philadelphia, PA, 19104 USA.

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Human cognitive flexibility, the ability to switch mental tasks, relies on brain networks. Better alignment between brain activity and white matter structure correlates with higher cognitive flexibility.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Graph Signal Processing

Background:

  • Cognitive flexibility involves switching mental states, requiring dynamic brain activity.
  • This brain activity relies on anatomical white matter networks connecting brain regions.
  • Understanding how white matter constrains brain dynamics during flexibility is challenging.

Purpose of the Study:

  • To investigate the relationship between white matter network architecture and brain signal dynamics during cognitive flexibility.
  • To determine if the alignment between functional brain signals and anatomical networks relates to individual differences in cognitive flexibility.

Main Methods:

  • Applied graph signal processing to functional (BOLD) and structural (white matter) neuroimaging data.
  • Analyzed data from 28 individuals performing a cognitive flexibility task.
  • Developed a measure to quantify the alignment between brain signals and network architecture.

Main Results:

  • Found a significant association between the alignment of functional signals and white matter network architecture.
  • This structure-function alignment positively correlated with individual cognitive flexibility.
  • A concise measure integrating multi-modal neuroimaging data was computed.

Conclusions:

  • White matter network architecture plays a crucial role in supporting cognitive flexibility.
  • The alignment between brain structure and function is a key correlate of cognitive flexibility.
  • This study provides an integrated perspective on the neurobiological basis of cognitive flexibility.