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Human Claustrum Connections: Robust In Vivo Detection by DWI-Based Tractography in Two Large Samples.

Jil Wendt1,2, Antonia Neubauer1,2, Dennis M Hedderich1,2

  • 1Department of Diagnostic and Interventional Neuroradiology, School of Medicine and Health, Technical University of Munich, Munich, Germany.

Human Brain Mapping
|October 13, 2024
PubMed
Summary

Human brain imaging reveals consistent and replicable connections of the claustrum, a key structure for forebrain organization. This study validates in vivo tractography for mapping claustrum connectivity in health and disease.

Keywords:
DWIHCPclaustrumconnectivitymagnetic resonance imagingtractography

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Area of Science:

  • Neuroscience
  • Human Brain Imaging
  • Connectomics

Background:

  • The claustrum's role in mammalian forebrain organization is recognized, but human studies, especially on its connections, are scarce.
  • Challenges in human claustrum research include its complex anatomy and the unreliability of diffusion-weighted-imaging (DWI)-based tractography for mapping its connections.

Purpose of the Study:

  • To establish reliable in vivo tractography methods for identifying human claustrum connections.
  • To assess the consistency and replicability of claustrum connectivity across different individuals, cohorts, and imaging protocols.

Main Methods:

  • Utilized a deep-learning segmentation tool and DWI-based tractography in two large adult cohorts (n=162).
  • Reconstructed tracts between the claustrum and 13 cortical and 9 subcortical regions.
  • Employed probabilistic tractography, group average maps, and various connectivity metrics.

Main Results:

  • Demonstrated consistent and replicable ipsilateral and contralateral claustrum connections to cortical and subcortical regions.
  • Confirmed robustness of in vivo tractography across individuals, cohorts, DWI protocols, and connectivity measures.
  • Established a reliable method for examining human claustrum connectivity.

Conclusions:

  • This study provides robust evidence for reliable in vivo tractography of human claustrum connections.
  • The findings lay the groundwork for future investigations into claustrum connectivity in neurological and psychiatric conditions.
  • Validates the use of advanced imaging techniques for studying complex brain structures.