Diffusion imaging-based subdivision of the human hypothalamus: a magnetic resonance study with clinical implications

  • Peter Schönknecht
  • Alfred Anwander
  • Friederike Petzold
  • Stephanie Schindler
  • Thomas R. Knösche
  • Harald E. Möller
  • Ulrich Hegerl
  • Robert Turner
  • Stefan Geyer
Original Paper

DOI: 10.1007/s00406-012-0389-5

Cite this article as:
Schönknecht, P., Anwander, A., Petzold, F. et al. Eur Arch Psychiatry Clin Neurosci (2013) 263: 497. doi:10.1007/s00406-012-0389-5

Abstract

The hypothalamus and its subdivisions are involved in many neuropsychiatric conditions such as affective disorders, schizophrenia, or narcolepsy, but parcellations of hypothalamic subnuclei have hitherto been feasible only with histological techniques in postmortem brains. In an attempt to map subdivisions of the hypothalamus in vivo, we analyzed the directionality information from high-resolution diffusion-weighted magnetic resonance images of healthy volunteers. We acquired T1-weighted and diffusion-weighted scans in ten healthy subjects at 3 T. In the T1-weighted images, we manually delineated an individual mask of the hypothalamus in each subject and computed in the co-registered diffusion-weighted images the similarity of the principal diffusion direction for each pair of mask voxels. By clustering the similarity matrix into three regions with a k-means algorithm, we obtained an anatomically coherent arrangement of subdivisions across hemispheres and subjects. In each hypothalamus mask, we found an anterior region with dorsoventral principal diffusion direction, a posteromedial region with rostro-caudal direction, and a lateral region with mediolateral direction. A comparative analysis with microstructural hypothalamus parcellations from the literature reveals that each of these regions corresponds to a specific group of hypothalamic subnuclei as defined in postmortem brains. This is to our best knowledge the first in vivo study that attempts a delineation of hypothalamic subdivisions by clustering diffusion-weighted magnetic resonance imaging data. When applied in a larger sample of neuropsychiatric patients, a structural analysis of hypothalamic subnuclei should contribute to a better understanding of the pathogenesis of neuropsychiatric conditions such as affective disorders.

Keywords

Hypothalamus Subdivision Diffusion MRI In vivo 

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Peter Schönknecht
    • 1
  • Alfred Anwander
    • 2
  • Friederike Petzold
    • 1
  • Stephanie Schindler
    • 1
  • Thomas R. Knösche
    • 2
  • Harald E. Möller
    • 2
  • Ulrich Hegerl
    • 1
  • Robert Turner
    • 2
  • Stefan Geyer
    • 2
  1. 1.Department of Psychiatry and PsychotherapyUniversity Hospital LeipzigLeipzigGermany
  2. 2.Max Planck Institute for Human Cognitive and Brain SciencesLeipzigGermany

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