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Motor network degeneration in amyotrophic lateral sclerosis: a structural and functional connectivity study
Esther Verstraete1, Martijn P van den Heuvel, Jan H Veldink
1Department of Neurology, Rudolf Magnus Institute of Neuroscience, University Medical Centre Utrecht, Utrecht, The Netherlands.
Plos One
|November 10, 2010
Summary
Amyotrophic lateral sclerosis (ALS) causes structural brain changes in motor networks. Increased functional connectivity in these networks correlates with faster disease progression, suggesting disease spread.
Area of Science:
- Neuroimaging
- Neurodegeneration
- Motor System Disorders
Background:
- Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease characterized by motor neuron degeneration.
- The impact of ALS on the central motor network remains poorly understood.
- This study integrates structural and functional imaging to investigate motor network changes in ALS.
Purpose of the Study:
- To investigate structural and functional alterations in the motor network of patients with ALS.
- To explore the relationship between these alterations and disease progression.
Main Methods:
- Combined structural (cortical thickness, diffusion tensor imaging) and functional (resting-state fMRI) imaging.
- Analyzed motor network connectivity in ALS patients and healthy controls.
Main Results:
- Observed focal cortical thinning in the primary motor area of ALS patients, correlating with disease progression.
- Diffusion tensor imaging revealed reduced fractional anisotropy in the corpus callosum and corticospinal tract.
- Functional organization of the motor network was preserved, but increased functional connectedness correlated with disease progression rate.
Conclusions:
- Demonstrated structural deterioration of the motor network in ALS.
- Functional connectivity measures were preserved but linked to disease progression.
- Suggests disease spread along functional connections within the motor network in ALS.
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