Brain imaging markers differ in Parkinson’s disease
A review linked some MRI markers with motor symptom severity. Psychiatric associations were not observed, while cognition and sleep results conflicted.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
People with Parkinson’s disease had different MRI measures related to glymphatic clearance. The DTI-ALPS index and enlarged perivascular space count correlated with motor symptom severity. Psychiatric symptom associations were not observed in the reviewed evidence; cognition and sleep findings conflicted. These observational results do not establish causation or treatment benefits.
Imaging methods varied, and several pooled results showed substantial inconsistency. This abstract-based account cannot establish whether the markers help diagnose Parkinson’s disease or predict an individual’s course.
What scans measured
Researchers examined a diffusion MRI index called DTI-ALPS and the number and volume of enlarged spaces around blood vessels. These imaging measures assess glymphatic function; they are not measurements of symptom improvement.
Different patterns
Compared with healthy controls, participants with Parkinson’s disease had a lower diffusion index and more numerous, larger-volume perivascular spaces. Reported motor-severity correlations concerned the diffusion index and space count, without establishing a corresponding volume correlation.
The original publication
Glymphatic Dysfunction in Parkinson's Disease: A Systematic Review and Meta-Analysis of Neuroimaging Studies.
Rajai Firouzabadi S, Mohammadi I, Aghajanian S et al.
Mov Disord Clin Pract · 2026
- PubMed ID
- 40817751
- Record checked
AI-assisted research and writing. This explains one selected publication; it is not a complete review of everything known. Our approach.
One more question, understood.
Keep track of the research you’ve explored.