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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
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.
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.
