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Altered dynamic functional architecture in type 2 diabetes mellitus.

Yifan Li1,2, Mingrui Li1,2,3, Kui Zhao1,2

  • 1First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China.

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Summary

Type 2 diabetes mellitus (T2DM) impacts brain architecture stability, particularly in the right supra-marginal gyrus and right median cingulate gyrus. This study explores how altered brain connectivity contributes to cognitive decline in T2DM patients.

Keywords:
cognitive declinedynamic effective connectivitydynamic functional stabilityfunctional architectureresting statetype 2 diabetes mellitus

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Area of Science:

  • Neuroimaging
  • Cognitive Neuroscience
  • Endocrinology

Background:

  • Type 2 diabetes mellitus (T2DM) is linked to accelerated cognitive decline and dementia.
  • The dynamic functional connectivity (dFC) and architecture of the brain during resting states are not fully understood.
  • Exploring brain changes from the perspective of architectural stability is crucial for understanding T2DM-related cognitive impairment.

Purpose of the Study:

  • To investigate the stability of dynamic functional architecture in individuals with T2DM.
  • To analyze dynamic effective connectivity (dEC) to understand information flow within the fluctuating brain architecture of T2DM patients.

Main Methods:

  • Utilized a fixed dynamic time scale to assess brain functional architecture stability.
  • Employed dynamic effective connectivity (dEC) to examine information flow patterns.
  • Compared T2DM subjects with control groups to identify differences in brain connectivity and stability.

Main Results:

  • Identified decreased stability in the right supra-marginal gyrus (SMG) and right median cingulate gyrus (MCG) in T2DM subjects.
  • Observed increased variation in dEC between the left inferior frontal gyrus (IFG) and the right MCG.
  • Determined the direction of causal flow from the right MCG to the left IFG.

Conclusions:

  • The combination of stability and dEC analysis offers a novel approach to understanding brain dynamics and information fluidity.
  • Altered dynamic brain architecture in T2DM may provide new insights into the mechanisms underlying cognitive decline.
  • This research highlights the potential of neuroimaging to reveal T2DM-related neurological changes.