Altered resting-state connectivity in Huntington's disease
Cornelius J Werner1, Imis Dogan, Christian Saß
1Department of Neurology, RWTH Aachen University, Aachen, Germany; JARA BRAIN - Translational Brain Medicine, Jülich and Aachen, Germany.
Human Brain Mapping
|August 29, 2013
Summary
Huntington's disease (HD) shows increased functional connectivity within resting-state networks (RSN), suggesting impaired differentiation. This functional alteration is linked to disease progression and impacts brain circuits beyond structural damage.
Area of Science:
- Neuroscience
- Medical Imaging
- Genetics
Background:
- Huntington's disease (HD) is an inherited neurodegenerative disorder.
- HD presents with motor, cognitive, and psychiatric symptoms.
- Understanding functional brain changes is crucial for HD research.
Purpose of the Study:
- Investigate functional connectivity in resting-state networks (RSN) in HD patients.
- Examine relationships between functional connectivity, clinical symptoms, and disease progression.
- Identify alterations in brain network integrity using resting-state fMRI (rs-fMRI).
Main Methods:
- Utilized rs-fMRI on 17 HD patients and 19 controls.
- Applied Independent Component Analysis (ICA) and dual-regression.
- Controlled for structural degeneration using voxel-based morphometry.
Main Results:
- HD patients exhibited increased intrinsic functional connectivity in RSNs (thalamus, striatum, prefrontal, parietal).
- Motor impairment correlated with higher connectivity in motor/parietal areas.
- Reduced long-range connectivity between parietal networks was observed in HD.
Conclusions:
- Functional connectivity is significantly altered within and between RSNs in HD.
- Increased connectivity may indicate reduced intra-network differentiation with disease progression.
- Rs-fMRI offers insights into neuronal dysfunction beyond structural damage in HD.
Keywords:
Huntington's diseasedefault mode networkfunctional connectivityneurodegenerative diseasesresting-state fMRIstructural degenerationvoxel-based morphometryMore Related Videos
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