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Magnetic resonance imaging and extrapyramidal movement disorders
1Magnetic Resonance Imaging and Research, Barrow Neurological Institute, Phoenix, Ariz.
European Neurology
|January 1, 1989
Summary
High-field strength MRI accurately maps brain iron distribution, which is linked to aging and neurological disorders. Abnormal iron patterns detected via magnetic resonance imaging can indicate conditions like Parkinson
Area of Science:
- Neuroimaging
- Neuroscience
- Biochemistry
Background:
- Ferritin is the primary iron storage protein in the brain.
- Iron distribution in the brain changes with age and is altered in various neurological diseases.
- High-field strength magnetic resonance imaging (MRI) is sensitive to iron concentrations.
Purpose of the Study:
- To detail the use of high-field strength MRI for assessing brain iron distribution.
- To correlate specific patterns of brain iron deposition with normal aging and neurological conditions.
Main Methods:
- Utilized high-field strength MRI (T2-weighted imaging).
- Mapped signal hypointensity (darkness) indicative of ferritin-bound iron.
- Correlated MRI findings with known iron distribution in normal adults and specific patient groups.
Main Results:
- Normal adults show highest iron concentrations in the globus pallidus, red nucleus, substantia nigra (pars reticulata), and cerebellar dentate nucleus.
- Iron increases in the putamen with age.
- Premature putamen and caudate hypointensity suggests multiple-system atrophy; globus pallidus hypointensity suggests Hallervorden-Spatz disease in children.
- Dyskinetic disorders may show putaminal hyperintensity related to gliosis.
Conclusions:
- High-field strength MRI is a valuable tool for mapping brain iron distribution.
- Specific patterns of iron deposition or alteration visualized by MRI can aid in diagnosing neurological disorders.
- MRI-detectable iron changes are associated with aging and neurodegenerative conditions.