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Regional structural...
Regional structural hypo- and hyperconnectivity of frontal–striatal and frontal–thalamic pathways in behavioral variant frontotemporal dementia
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- Jakabek, David (author)
- University of Wollongong
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- Power, Brian D. (author)
- University of Notre Dame Australia,North Metropolitan Health Service
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- Macfarlane, Matthew D. (author)
- University of Wollongong,Illawarra Shoalhaven Local Health District
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- Walterfang, Mark (author)
- University of Melbourne,Royal Melbourne Hospital
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- Velakoulis, Dennis (author)
- University of Melbourne,Royal Melbourne Hospital
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- van Westen, Danielle (author)
- Skåne University Hospital
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- Lätt, Jimmy (author)
- Lund University,Lunds universitet,MR Physics,Forskargrupper vid Lunds universitet,Lund University Research Groups,Skåne University Hospital
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- Nilsson, Markus (author)
- Lund University,Lunds universitet,Diagnostisk radiologi, Lund,Sektion V,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Lund University Bioimaging Center,MR Physics,Forskargrupper vid Lunds universitet,Diagnostic Radiology, (Lund),Section V,Department of Clinical Sciences, Lund,Faculty of Medicine,Lund University Research Groups
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- Looi, Jeffrey C.L. (author)
- Australian National University,Royal Melbourne Hospital,Canberra Hospital,University of Melbourne
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- Santillo, Alexander F. (author)
- Lund University,Lunds universitet,Klinisk minnesforskning,Forskargrupper vid Lunds universitet,Clinical Memory Research,Lund University Research Groups
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(creator_code:org_t)
- 2018-06-20
- 2018
- English 11 s.
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In: Human Brain Mapping. - : Wiley. - 1065-9471. ; 39:10, s. 4083-4093
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Abstract
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- Behavioral variant frontotemporal dementia (bvFTD) has been predominantly considered as a frontotemporal cortical disease, with limited direct investigation of frontal–subcortical connections. We aim to characterize the grey and white matter components of frontal–thalamic and frontal–striatal circuits in bvFTD. Twenty-four patients with bvFTD and 24 healthy controls underwent morphological and diffusion imaging. Subcortical structures were manually segmented according to published protocols. Probabilistic pathways were reconstructed separately from the dorsolateral, orbitofrontal and medial prefrontal cortex to the striatum and thalamus. Patients with bvFTD had smaller cortical and subcortical volumes, lower fractional anisotropy, and higher mean diffusivity metrics, which is consistent with disruptions in frontal–striatal–thalamic pathways. Unexpectedly, regional volumes of the striatum and thalamus connected to the medial prefrontal cortex were significantly larger in bvFTD (by 135% in the striatum, p =.032, and 217% in the thalamus, p =.004), despite smaller dorsolateral prefrontal cortex connected regional volumes (by 67% in the striatum, p =.002, and 65% in the thalamus, p =.020), and inconsistent changes in orbitofrontal cortex connected regions. These unanticipated findings may represent compensatory or maladaptive remodeling in bvFTD networks. Comparisons are made to other neuropsychiatric disorders suggesting a common mechanism of changes in frontal–subcortical networks; however, longitudinal studies are necessary to test this hypothesis.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Neurologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Neurology (hsv//eng)
Keyword
- behavioral variant frontotemporal dementia
- connectivity
- DTI
- MRI
- probabilistic tractography
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Jakabek, David
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Power, Brian D.
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Macfarlane, Matt ...
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Walterfang, Mark
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Velakoulis, Denn ...
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van Westen, Dani ...
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show more...
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Lätt, Jimmy
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Nilsson, Markus
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Looi, Jeffrey C. ...
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Santillo, Alexan ...
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- About the subject
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- MEDICAL AND HEALTH SCIENCES
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MEDICAL AND HEAL ...
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and Clinical Medicin ...
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and Neurology
- Articles in the publication
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Human Brain Mapp ...
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Lund University