| Title |
Gray matter and white matter changes in non-demented amyotrophic lateral sclerosis patients with or without cognitive impairment: A combined voxel-based morphometry and tract-based spatial statistics whole-brain analysis
|
|---|---|
| Published in |
Brain Imaging and Behavior, April 2017
|
| DOI | 10.1007/s11682-017-9722-y |
| Pubmed ID | |
| Authors |
Foteini Christidi, Efstratios Karavasilis, Franz Riederer, Ioannis Zalonis, Panagiotis Ferentinos, Georgios Velonakis, Sophia Xirou, Michalis Rentzos, Georgios Argiropoulos, Vasiliki Zouvelou, Thomas Zambelis, Athanasios Athanasakos, Panagiotis Toulas, Konstantinos Vadikolias, Efstathios Efstathopoulos, Spyros Kollias, Nikolaos Karandreas, Nikolaos Kelekis, Ioannis Evdokimidis |
| Abstract |
The phenotypic heterogeneity in amyotrophic lateral sclerosis (ALS) implies that patients show structural changes within but also beyond the motor cortex and corticospinal tract and furthermore outside the frontal lobes, even if frank dementia is not detected. The aim of the present study was to investigate both gray matter (GM) and white matter (WM) changes in non-demented amyotrophic lateral sclerosis (ALS) patients with or without cognitive impairment (ALS-motor and ALS-plus, respectively). Nineteen ALS-motor, 31 ALS-plus and 25 healthy controls (HC) underwent 3D-T1-weighted and 30-directional diffusion-weighted imaging on a 3 T MRI scanner. Voxel-based morphometry and tract-based spatial-statistics analysis were performed to examine GM volume (GMV) changes and WM differences in fractional anisotropy (FA), axial and radial diffusivity (AD, RD, respectively). Compared to HC, ALS-motor patients showed decreased GMV in frontal and cerebellar areas and increased GMV in right supplementary motor area, while ALS-plus patients showed diffuse GMV reduction in primary motor cortex bilaterally, frontotemporal areas, cerebellum and basal ganglia. ALS-motor patients had increased GMV in left precuneus compared to ALS-plus patients. We also found decreased FA and increased RD in the corticospinal tract bilaterally, the corpus callosum and extra-motor tracts in ALS-motor patients, and decreased FA and increased AD and RD in motor and several WM tracts in ALS-plus patients, compared to HC. Multimodal neuroimaging confirms motor and extra-motor GM and WM abnormalities in non-demented cognitively-impaired ALS patients (ALS-plus) and identifies early extra-motor brain pathology in ALS patients without cognitive impairment (ALS-motor). |
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Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 87 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 87 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 14 | 16% |
| Researcher | 12 | 14% |
| Student > Master | 9 | 10% |
| Student > Bachelor | 7 | 8% |
| Student > Doctoral Student | 6 | 7% |
| Other | 11 | 13% |
| Unknown | 28 | 32% |
| Readers by discipline | Count | As % |
|---|---|---|
| Medicine and Dentistry | 18 | 21% |
| Neuroscience | 17 | 20% |
| Psychology | 5 | 6% |
| Agricultural and Biological Sciences | 3 | 3% |
| Nursing and Health Professions | 2 | 2% |
| Other | 10 | 11% |
| Unknown | 32 | 37% |
Attention Score in Context
This research output has an Altmetric Attention Score of 10. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 05 March 2019.
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#3,223,783
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Outputs from Brain Imaging and Behavior
#184
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#61,287
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Outputs of similar age from Brain Imaging and Behavior
#6
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