Related Experiment Videos
White matter hyperintensities in subjects with bipolar disorder
Kyung Heup Ahn1, In Kyoon Lyoo, Ho Kyu Lee
1Mclean Brain Imaging Center and Harvard Medical School, Belmont, MA, USA.
Psychiatry and Clinical Neurosciences
|October 16, 2004
Summary
This study confirms that individuals with bipolar disorder exhibit a higher prevalence of white matter hyperintensities (WMH) compared to healthy individuals. Advanced MRI techniques effectively detected subtle WMH differences in bipolar disorder patients.
Area of Science:
- Neuroimaging
- Psychiatry
- Radiology
Background:
- Divergent reports exist on white matter hyperintensities (WMH) prevalence and severity in bipolar disorder.
- Accurate assessment of WMH is crucial for understanding neurobiological underpinnings of bipolar disorder.
Purpose of the Study:
- To evaluate the prevalence and severity of WMH in bipolar disorder patients.
- To compare WMH in bipolar disorder patients versus healthy controls using advanced MRI techniques.
Main Methods:
- Utilized 3-mm contiguous MRI slices and FLAIR imaging for detailed WMH assessment.
- Employed a modified rating system (Fazekas' and Coffey's scales) to detect subtle WMH.
- Scanned 43 bipolar patients (SCID-IV diagnosed) and 39 healthy controls using a 1.5-T GE scanner.
Main Results:
- Bipolar disorder subjects showed a significantly greater prevalence of WMH abnormalities compared to controls.
- The difference was primarily driven by deep WMH, with higher prevalence in the bipolar group.
- Advanced MRI with thinner slices successfully identified small WMH differences.
Conclusions:
- The study confirms a higher prevalence of WMH in individuals with bipolar disorder.
- Sensitive MRI techniques are effective in detecting subtle WMH abnormalities in bipolar disorder.
- Findings contribute to understanding the neurobiology of bipolar disorder.