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Functional brain networks and abnormal connectivity in the movement disorders
Kathleen L Poston1, David Eidelberg
1Stanford University Medical Center, 300 Pasteur Drive, Stanford, CA 94305, USA. klposton@stanford.edu
Neuroimage
|December 31, 2011
Summary
Neuroimaging reveals altered brain circuit connectivity in Parkinson's disease (PD) and dystonia, offering insights into movement disorders and potential therapeutic targets. These findings highlight network abnormalities in both motor and cognitive functions.
Area of Science:
- Neuroscience
- Medical Imaging
- Neurology
Background:
- Movement disorders like Parkinson's disease (PD) and dystonia stem from neurophysiological changes in brain circuits.
- Neuroimaging techniques are crucial for understanding circuit connectivity and identifying therapeutic targets in these conditions.
Purpose of the Study:
- To investigate altered connectivity within the cortico-striato-pallidothalamocortical (CSPTC) and cerebello-thalamo-cortical (CbTC) circuits in PD and dystonia.
- To explore the utility of functional imaging techniques in identifying disease-specific network alterations and potential therapeutic strategies.
Main Methods:
- Network analysis of (18)F-fluorodeoxyglucose (FDG) positron emission tomography (PET) to identify abnormal metabolic networks in PD.
- Task-based and resting-state functional magnetic resonance imaging (fMRI) studies to assess altered connectivity patterns in PD.
- Multimodal imaging, including magnetic resonance diffusion tensor imaging, applied to patients with primary genetic dystonia.
Main Results:
- FDG-PET network analysis identified abnormal metabolic networks linked to PD motor symptoms (akinesia, tremor) and cognitive dysfunction.
- fMRI studies corroborated altered connectivity patterns observed in PD-related networks.
- Network analysis in dystonia revealed abnormal metabolic patterns in both affected and unaffected mutation carriers, suggesting CbTC circuit involvement in inherited dystonia.
Conclusions:
- Functional neuroimaging effectively identifies abnormal brain network connectivity in movement disorders like PD and dystonia.
- Altered CSPTC and CbTC circuit connectivity are implicated in the pathophysiology of PD and dystonia.
- Advancements in functional imaging promise to deepen the understanding of movement disorders and guide the development of novel therapies.
