Evidence map›Paper›PMID 40504072›Full record

ArticleMovement disorders clinical practice2025

Differential Effects of Levodopa and Stimulation on Post-Surgery Freezing of Gait in Subthalamic Nucleus Deep Brain Stimulation Parkinson's Disease Patients: A Clinical and Kinematic Analysis.

Raquel Barbosa, Paulo Bastos, Patrícia Pita Lobo, Catarina Correia Rodrigues, Anabela Valadas, Leonor Correia Guedes, Beatriz Mano, Sara Alberto, Vitor Paixão, Mário Miguel Rosa and 4 more

Abstract read
In one paragraph

Article in Movement disorders clinical practice, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–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

1 citing paper in PubMed.

  1. Review
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

14 authors.

Raquel BarbosaNeurology Department, Centre Hospitalier Universitaire Toulouse, Toulouse, France.ORCID https://orcid.org/0000-0002-3138-2975
Paulo BastosNeurology Department, Centre Hospitalier Universitaire Toulouse, Toulouse, France.ORCID https://orcid.org/0000-0002-1195-3611
Patrícia Pita LoboDepartment of Neurosciences and Mental Health, Neurology Service, Hospital Santa Maria, Lisbon, Portugal.
Catarina Correia RodriguesDepartment of Neurosciences and Mental Health, Neurology Service, Hospital Santa Maria, Lisbon, Portugal.ORCID https://orcid.org/0000-0001-5529-717X
Anabela ValadasDepartment of Neurosciences and Mental Health, Neurology Service, Hospital Santa Maria, Lisbon, Portugal.
Leonor Correia GuedesDepartment of Neurosciences and Mental Health, Neurology Service, Hospital Santa Maria, Lisbon, Portugal.
Beatriz ManoKinetikos, Coimbra, Portugal.
Sara AlbertoKinetikos, Coimbra, Portugal.
Vitor PaixãoKinetikos, Coimbra, Portugal.
Mário Miguel RosaDepartment of Neurosciences and Mental Health, Neurology Service, Hospital Santa Maria, Lisbon, Portugal.
Ricardo MatiasKinetikos, Coimbra, Portugal.
Daniel MartinsChampalimaud Research and Clinical Centre, Champalimaud Centre for the Unknown, Lisbon, Portugal.
Marcelo MendonçaNova Medical School, Faculdade de Ciências Medicas, Universidade Nova de Lisboa, Lisbon, Portugal.ORCID https://orcid.org/0000-0003-3587-8553
Miguel CoelhoDepartment of Neurosciences and Mental Health, Neurology Service, Hospital Santa Maria, Lisbon, Portugal.

Funding

Fundação para a Ciência e Tecnologia (FCT) through a Ph.D. Scholarship (SFRH/BD/143797/2019) SFRH/BD/143797/2019Santa Casa da Misericórdia de Lisboa Prémio João Lobo Antunes
6 · The paper itself

Abstract

backgroundThe long-term efficacy of high-frequency subthalamic nucleus deep brain stimulation (STN-DBS) on freezing of gait (FOG) remains unclear. We aimed to study the mechanism and optimal therapeutic approach to long-term post-surgery FOG.

objectiveThe aim was to assess the mechanism and optimal therapeutic approach to long-term post-surgery FOG.

methodsSeventeen Parkinson's disease (PD) STN-DBS patients with a FOG score (item 3.11) ≥2 in the MedON/StimON condition were evaluated under 5 experimental conditions, including a low-frequency (60 Hz) condition maintaining the same total energy delivered. In each condition, gait and FOG episodes (#FOG) were assessed using clinical (eg, a 3 × 14-m Stand-Walk-Sit Test) and kinematic data from inertial measurement units (IMU).

resultsCompared to MedOFF/StimOFF, #FOG significantly decreased in the MedON/StimON 130-Hz condition. Either stimulation or levodopa (LD) (MedOFF/StimON or MedON/StimOFF) also significantly reduced #FOG and Stand-Walk-Sit Test (SWS) time compared to MedOFF/StimOFF. No significant difference in #FOG episodes or SWS time was found between 130 and 60 Hz, though 60-Hz stimulation had lower axial scores. Individual responses to LD or stimulation varied: (1) 3 patients improved #FOG with LD but worsened with stimulation, whereas 5 exhibited the reverse; (2) in 9 patients, low-frequency stimulation outperformed high-frequency stimulation in reducing #FOG. Gait variability was the strongest kinematic dimension associated with FOG, with severity accurately identified via a neural network trained on sensor data.

conclusionPost-DBS FOG in the best-functional state is largely therapy resistant, partially improved by stimulation and medication. Individual variability in responses to LD and stimulation underscores the need to determine FOG circuit mechanisms, as treatment remains an unmet clinical need.

Indexed as

Antiparkinson AgentsDeep Brain StimulationGait Disorders, NeurologicLevodopaParkinson DiseaseSubthalamic NucleusAgedBiomechanical PhenomenaFemaleHumansMaleMiddle AgedTreatment OutcomeAntiparkinson AgentsLevodopadeep brain stimulationfreezing of gaitgait analysisinertial measurement unitsParkinson's disease

Identifiers

PMID40504072
PMCPMC12625104

What Socratic holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

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 Socratic graph.