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Temporal lobe changes in early, untreated Parkinson's disease
W R Wayne Martin1, Marguerite Wieler, Myrlene Gee
1Division of Neurology, University of Alberta, Edmonton, Alberta, Canada. wayne.martin@ualberta.ca
Summary
Early Parkinson's disease (PD) shows white matter changes in the right anterior temporal lobe, not grey matter abnormalities. These subcortical white matter alterations may be the earliest signs in untreated PD patients.
Area of Science:
- Neuroimaging
- Neurology
- Neuroscience
Background:
- Parkinson's disease (PD) is a neurodegenerative disorder.
- Early detection of PD-related brain changes is crucial for timely intervention.
- Focal cortical abnormalities in early, untreated PD require further investigation.
Purpose of the Study:
- To investigate focal cortical abnormalities in early Parkinson's disease.
- To determine if grey matter (GM) or white matter (WM) changes are present in untreated early PD patients.
- To identify the earliest structural brain alterations in Parkinson's disease.
Main Methods:
- Magnetic resonance imaging (MRI) and voxel-based morphometry were used.
- 26 untreated early Parkinson's disease patients and 14 healthy controls were studied.
- Cognitive screening tests were administered to assess cognitive function.
Main Results:
- No significant differences in grey matter (GM) volumes were found between patients and controls.
- Decreased white matter (WM) volume was observed in the anterior right fusiform gyrus and superior temporal gyrus in PD patients.
- No correlations were found between cognitive test scores and localized GM or WM volumes.
Conclusions:
- Early Parkinson's disease is associated with white matter (WM) changes in the right anterior temporal lobe.
- These subcortical white matter alterations may represent the earliest detectable changes in untreated PD.
- The findings suggest that white matter integrity is affected early in the course of Parkinson's disease.
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