| Title |
Pathophysiology of the behavioral variant of frontotemporal lobar degeneration: A study combining MRI and FDG-PET
|
|---|---|
| Published in |
Brain Imaging and Behavior, February 2016
|
| DOI | 10.1007/s11682-016-9521-x |
| Pubmed ID | |
| Authors |
M-S. Buhour, F. Doidy, M. Laisney, A. L. Pitel, V. de La Sayette, F. Viader, F. Eustache, B. Desgranges |
| Abstract |
Gray matter (GM) lobar atrophy and glucose hypometabolism are well-described hallmarks of frontotemporal lobar degeneration (FTLD), but the relationships between them are still poorly understood. In this study, we aimed to show the patterns of GM atrophy and hypometabolism in a sample of 15 patients with the behavioral variant of FTLD (bv-FTD), compared to 15 healthy controls, then to provide a direct comparison between GM atrophy and hypometabolism, using a voxel-based method specially designed to statistically compare the two imaging modalities. The participants underwent structural magnetic resonance imaging and (18)F-fluorodeoxyglucose (FDG) positron emission tomography examinations. First, between-group comparisons of GM volume and metabolism were performed. Then, in the patient group, correlations between regional alterations and direct between-modality voxelwise comparison were performed. Finally, we examined individual patterns of brain abnormalities for each imaging modality and each patient. The observed patterns of GM atrophy and hypometabolism were consistent with previous studies. We found significant voxelwise correlations between changes in GM and FDG uptake, mainly in the frontal cortex, corresponding to the typical profile of alterations in bv-FTD. The direct comparison revealed regional variability in the relationship between hypometabolism and atrophy. This analysis revealed greater atrophy than hypometabolism in the right putamen and amygdala, and left insula and superior temporal gyrus, whereas hypometabolism was more severe than GM atrophy in the left caudate nucleus and anterior cingulate cortex. Finally, GM atrophy affected the right amygdala/hippocampus and left insula in 95 % of the patients. These findings provide evidence for regional variations in the hierarchy of hypometabolism and GM atrophy and the relationships between them, and enhance our understanding of the pathophysiology of bv-FTD. |
Mendeley readers
The data shown below were compiled from readership statistics for 52 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 52 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Master | 8 | 15% |
| Student > Ph. D. Student | 7 | 13% |
| Student > Bachelor | 6 | 12% |
| Student > Postgraduate | 6 | 12% |
| Researcher | 4 | 8% |
| Other | 5 | 10% |
| Unknown | 16 | 31% |
| Readers by discipline | Count | As % |
|---|---|---|
| Medicine and Dentistry | 11 | 21% |
| Neuroscience | 7 | 13% |
| Psychology | 6 | 12% |
| Social Sciences | 2 | 4% |
| Nursing and Health Professions | 1 | 2% |
| Other | 3 | 6% |
| Unknown | 22 | 42% |
Attention Score in Context
This research output has an Altmetric Attention Score of 8. 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 24 June 2016.
All research outputs
#4,114,490
of 22,844,985 outputs
Outputs from Brain Imaging and Behavior
#229
of 1,155 outputs
Outputs of similar age
#72,944
of 397,355 outputs
Outputs of similar age from Brain Imaging and Behavior
#10
of 36 outputs
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