![Motor and non-motor circuit disturbances in early Parkinson disease: which happens first? | Nature Reviews Neuroscience Motor and non-motor circuit disturbances in early Parkinson disease: which happens first? | Nature Reviews Neuroscience](https://media.springernature.com/m685/springer-static/image/art%3A10.1038%2Fs41583-021-00542-9/MediaObjects/41583_2021_542_Fig1_HTML.png)
Motor and non-motor circuit disturbances in early Parkinson disease: which happens first? | Nature Reviews Neuroscience
![Biomolecules | Free Full-Text | Treatment Options for Motor and Non-Motor Symptoms of Parkinson's Disease Biomolecules | Free Full-Text | Treatment Options for Motor and Non-Motor Symptoms of Parkinson's Disease](https://www.mdpi.com/biomolecules/biomolecules-11-00612/article_deploy/html/images/biomolecules-11-00612-g001.png)
Biomolecules | Free Full-Text | Treatment Options for Motor and Non-Motor Symptoms of Parkinson's Disease
![The Epidemiology of Nonmotor Symptoms in Parkinson's Disease (Cohort and Other Studies). | Semantic Scholar The Epidemiology of Nonmotor Symptoms in Parkinson's Disease (Cohort and Other Studies). | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/6b7d7ec0c9e99b171c44eb5f9360d4c57f395758/14-Figure4-1.png)
The Epidemiology of Nonmotor Symptoms in Parkinson's Disease (Cohort and Other Studies). | Semantic Scholar
![Non-motor symptoms: the core of multi-morbid Parkinson's disease | British Journal of Hospital Medicine Non-motor symptoms: the core of multi-morbid Parkinson's disease | British Journal of Hospital Medicine](https://www.magonlinelibrary.com/cms/10.12968/hmed.2014.75.1.18/asset/images/medium/hmed.2014.75.1.18_t03.jpg)