Evidence map›Paper›PMID 33879872›Full record

ReviewNature reviews. Neurology2021

Prodromal Parkinson disease subtypes - key to understanding heterogeneity.

Daniela Berg, Per Borghammer, Seyed-Mohammad Fereshtehnejad, Sebastian Heinzel, Jacob Horsager, Eva Schaeffer, Ronald B Postuma

2 registry-linked trialsAbstract readReview
PubMed Publisher
In one paragraph

Review in Nature reviews. Neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 231 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
231citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT06885541 narecruitingnot on this mapstarted 2026, after this paper: background citation

Detection of Internal Tremors by Oscillometry in Parkinson's Patient : a Pilot Study

TypeinterventionalSponsorUniversity Hospital, ToulouseRan2026 to 2027Enrolled60ConditionsParkinson DiseaseArmsDetection of objective internal tremors
NCT07324330 narecruitingnot on this mapstarted 2025, after this paper: background citation

Slowing Cognitive Decline in Alpha-synucleinopathies by Enhancing Physical Activity

TypeinterventionalSponsorUniversity Hospital, BonnRan2025 to 2029Enrolled130ConditionsParkinson Disease, Prodromal Stage, Neurodegenerative Diseases, Basal Ganglia DiseasesArmsIncrease of physical activity volume and intensity with the use of a motivational smartphone application
3 · Its place in the literature

Who cites it

231 citing papers in PubMed, 2 syntheses or guidelines pooled it.

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  15. 25International journal of molecular sciences · 2026
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171 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Daniela BergDepartment of Neurology, Christian-Albrechts-University, Kiel, Germany. daniela.berg@uksh.de.ORCID http://orcid.org/0000-0001-5796-5442
Per BorghammerDepartment of Nuclear Medicine and PET, Aarhus University Hospital, Aarhus, Denmark.
Seyed-Mohammad FereshtehnejadDepartment of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada.
Sebastian HeinzelDepartment of Neurology, Christian-Albrechts-University, Kiel, Germany.
Jacob HorsagerDepartment of Nuclear Medicine and PET, Aarhus University Hospital, Aarhus, Denmark.
Eva SchaefferDepartment of Neurology, Christian-Albrechts-University, Kiel, Germany.
Ronald B PostumaDepartment of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In Parkinson disease (PD), pathological processes and neurodegeneration begin long before the cardinal motor symptoms develop and enable clinical diagnosis. In this prodromal phase, risk and prodromal markers can be used to identify individuals who are likely to develop PD, as in the recently updated International Parkinson and Movement Disorders Society research criteria for prodromal PD. However, increasing evidence suggests that clinical and prodromal PD are heterogeneous, and can be classified into subtypes with different clinical manifestations, pathomechanisms and patterns of spatial and temporal progression in the CNS and PNS. Genetic, pathological and imaging markers, as well as motor and non-motor symptoms, might define prodromal subtypes of PD. Moreover, concomitant pathology or other factors, including amyloid-β and tau pathology, age and environmental factors, can cause variability in prodromal PD. Patients with REM sleep behaviour disorder (RBD) exhibit distinct patterns of α-synuclein pathology propagation and might indicate a body-first subtype rather than a brain-first subtype. Identification of prodromal PD subtypes and a full understanding of variability at this stage of the disease is crucial for early and accurate diagnosis and for targeting of neuroprotective interventions to ensure efficacy.

Indexed as

Prodromal SymptomsBiomarkersBrainHumansNeuroimagingParkinson DiseaseREM Sleep Behavior DisorderBiomarkers

Identifiers

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.