Evidence map›Paper›PMID 32361482›Full record

ArticleNeuroImage. Clinical2020

L-dopa treatment increases oscillatory power in the motor cortex of Parkinson's disease patients.

Chunyan Cao, Dianyou Li, Shikun Zhan, Chencheng Zhang, Bomin Sun, Vladimir Litvak

Abstract read
In one paragraph

Article in NeuroImage. Clinical, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
32citing 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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

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

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Article
  5. Natural Frequencies of Levodopa-Induced Dyskinesia in Parkinson's Disease.Annals of clinical and translational neurology · 2026
    Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Cortical Effects of Dopamine Replacement Account for Clinical Response Variability in Parkinson's Disease.Movement disorders : official journal of the Movement Disorder Society · 2025
    Article
  15. Article
  16. Subthalamic Nucleus Deep Brain Stimulation in the Beta Frequency Range Boosts Cortical Beta Oscillations and Slows Down Movement.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
    Article
  17. Article
  18. Article
  19. Dysfunction of motor cortices in Parkinson's disease.Cerebral cortex (New York, N.Y. : 1991) · 2024
    Review
  20. Article
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

6 authors.

Chunyan CaoDepartment of Neurosurgery, Affiliated Ruijin Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, 200025, China; Wellcome Centre for Human Neuroimaging, UCL Queen Square Institute of Neurology, London WC1N 3BG, UK.
Dianyou LiDepartment of Neurosurgery, Affiliated Ruijin Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, 200025, China.
Shikun ZhanDepartment of Neurosurgery, Affiliated Ruijin Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, 200025, China.
Chencheng ZhangDepartment of Neurosurgery, Affiliated Ruijin Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, 200025, China.
Bomin SunDepartment of Neurosurgery, Affiliated Ruijin Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, 200025, China. Electronic address: sbm11224@rjh.com.cn.
Vladimir LitvakWellcome Centre for Human Neuroimaging, UCL Queen Square Institute of Neurology, London WC1N 3BG, UK. Electronic address: v.litvak@ucl.ac.uk.

Funding

Medical Research Council MR/K005464/1Wellcome TrustWellcome Trust 203147/Z/16/Z
6 · The paper itself

Abstract

Parkinson's disease (PD) is a movement disorder caused by dopaminergic neurodegeneration. Levodopa (L-dopa) is an effective medication for alleviating motor symptoms in PD that has been shown previously to reduce subcortical beta (13-30 Hz) oscillations. How L-dopa influences oscillations in the motor cortex is unclear. In this study, 21 PD patients were recorded with magnetoencephalography (MEG) in L-dopa ON and OFF states. Oscillatory components of resting-state power spectra were compared between the two states and the significant effect was localized using beamforming. Unified Parkinson's Disease Rating Scale (UPDRS) III akinesia and rigidity sub-scores for the most affected hemibody were correlated with source power values for the contralateral hemisphere. An L-dopa-induced power increase was found over the central sensors significant in the 18-30 Hz range (F

Indexed as

AdultAgedAntiparkinson AgentsFemaleHumansLevodopaMagnetoencephalographyMaleMiddle AgedMotor CortexParkinson DiseaseAntiparkinson AgentsLevodopaCortexDopamineHumanM1Movement disorders

Identifiers

PMID32361482
PMCPMC7195547

What OpenQuestion holds

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Registered trials

None linked

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.