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

Schönknecht, P., Anwander, A., Petzold, F., Schindler, S., Knösche, T. R., Möller, H. E., et al. (2013). Diffusion imaging-based subdivision of the human hypothalamus: A magnetic resonance study with clinical implications. Klinische Neurophysiologie, 44(1), P159-P159. doi:10.1055/s-0033-1337300.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000E-E5C1-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-C08F-E
Genre: Meeting Abstract

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Schönknecht, Peter, Author
Anwander, Alfred1, Author              
Petzold, Friederike, Author
Schindler, Stephanie, Author
Knösche, Thomas R.2, Author              
Möller, Harald E.3, Author              
Hegerl, Ulrich, Author
Turner, Robert4, Author              
Geyer, Stefan4, Author              
Affiliations:
1Department Neuropsychology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634551              
2Methods and Development Unit Cortical Networks and Cognitive Functions, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634557              
3Methods and Development Unit Nuclear Magnetic Resonance, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634558              
4Department Neurophysics, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634550              

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 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 post-mortem 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 dorso-ventral principal diffusion direction, a posteromedial region with rostro-caudal direction, and a lateral region with medio-lateral 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 post-mortem 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.

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 Dates: 2013-03-192013-03-19
 Publication Status: Published online
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 Identifiers: DOI: 10.1055/s-0033-1337300
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Title: 57. Jahrestagung der Deutschen Gesellschaft für Klinische Neurophysiologie
Place of Event: Leipzig, Germany
Start-/End Date: 2013-03-21 - 2013-03-23

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Title: Klinische Neurophysiologie
Source Genre: Journal
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Publ. Info: Stuttgart : Thieme
Pages: - Volume / Issue: 44 (1) Sequence Number: - Start / End Page: P159 - P159 Identifier: ISSN: 1434-0275
CoNE: /journals/resource/954925623269