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Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
Published on: July 28, 2013
Reduced corpus callosum white matter microstructural integrity revealed by diffusion tensor eigenvalues in abstinent
In-Sung Kim1, Yang-Tae Kim, Hui-Jin Song
1Department of Medical & Biological Engineering, Kyungpook National University, Daegu, Republic of Korea.
Neurotoxicology
|January 13, 2009
Summary
Abstinent methamphetamine abusers show reduced white matter integrity in the brain's corpus callosum. This study suggests altered myelination may explain these neurotoxic effects in long-term users.
Area of Science:
- Neuroscience
- Radiology
Background:
- Long-term methamphetamine abuse may cause neurotoxic effects.
- White matter integrity is crucial for brain function.
Purpose of the Study:
- To investigate white matter integrity differences in the corpus callosum of abstinent methamphetamine abusers compared to controls.
- To explore the microstructural sources of potential abnormalities using diffusion tensor imaging.
Main Methods:
- Diffusion tensor imaging (DTI) was used to assess white matter integrity.
- Fractional anisotropy (FA) and eigenvalues of the diffusion ellipsoid were analyzed.
- Comparison between abstinent methamphetamine abusers and healthy control subjects.
Main Results:
- Significantly reduced FA was observed in the genu of the corpus callosum in methamphetamine-dependent subjects.
- Eigenvalues provided insights into the microstructural basis of these changes.
- Correlations between cognitive performance (WCST) and DTI measures suggest altered myelination.
Conclusions:
- Abstinent methamphetamine abusers exhibit compromised white matter integrity in the corpus callosum.
- Altered myelination is a potential microstructural cause for reduced FA in the genu of the corpus callosum.
- These findings highlight the lasting neurotoxic effects of methamphetamine abuse.
