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Brain Infarct Segmentation and Registration on MRI or CT for Lesion-symptom Mapping
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Imaging predictors of poststroke depression: methodological factors in voxel-based analysis
Sophia A Gozzi1, Amanda G Wood2, Jian Chen3
1Department of Medicine, School of Psychology and Psychiatry, Monash University, Melbourne, Australia Department of Medicine, Stroke and Ageing Research Group, Southern Clinical School, Monash University, Melbourne, Australia.
BMJ Open
|July 9, 2014
Summary
This study investigated stroke lesion location and poststroke depression. Results were inconclusive due to minimal infarct overlap, limiting the ability to associate specific brain regions with depression.
Area of Science:
- Neuroscience
- Neurology
- Psychiatry
Background:
- Poststroke depression is a common complication following a stroke.
- Identifying the neuroanatomical correlates of poststroke depression is crucial for understanding its pathophysiology.
Purpose of the Study:
- To explore the relationship between the specific location of brain lesions and the development of poststroke depression.
- To utilize statistical parametric mapping to analyze infarct patterns in relation to depression.
Main Methods:
- Patients experiencing a first stroke were assessed for depression using the Hospital Anxiety and Depression Scale (HADS) and the Mini-International Neuropsychiatric Interview (MINI).
- Magnetic Resonance Imaging (MRI) scans were used to identify and segment infarcts, which were then registered to a common stereotactic space.
- Statistical parametric mapping was employed to compare infarct locations between patients with and without depression.
Main Results:
- Twenty-seven percent of patients (15/55) were diagnosed with depression at follow-up.
- The study sample consisted of mild strokes, with a mean infarct volume of 19±53 mL.
- No significant associations were found between infarct location and poststroke depression after multiple comparison correction, primarily due to minimal overlap in lesion locations among patients.
Conclusions:
- The study did not find conclusive evidence linking specific brain lesion locations to poststroke depression.
- The high variability in infarct locations limited the statistical power to detect significant associations.
