Trial reportJournal of Parkinson's disease2024
Subthalamic and nigral stimulation for freezing of gait in Parkinson's disease: Randomized pilot trial.
Trial report in Journal of Parkinson's disease, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05415774 (Combined Deep Brain Stimulation of the Substantia Nigra Pars Reticulata and of the Subthalamic Nucleus for Unresponsive Freezing of Gait in Parkinson's Disease), which is not on this map. Cited by 4 papers, 1 of them a synthesis that pooled it.
What it found
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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.
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.
Combined Deep Brain Stimulation of the Substantia Nigra Pars Reticulata and of the Subthalamic Nucleus for Unresponsive Freezing of Gait in Parkinson's Disease: a Pilot Cross-over Study
Who cites it
4 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Effects of different types of deep brain stimulation on gait disorders in patients with Parkinson's disease: a network meta-analysis of randomized controlled trials.Frontiers in aging neuroscience · 2025Pooled it
- Low vs high frequency deep brain stimulation for Parkinson's disease-associated motor symptoms: A systematic review and meta-analysis of randomized control trials.Journal of Parkinson's disease · 2026Review
- Machine learning-based optimization of dual subthalamic nucleus and substantia nigra targeting in deep brain stimulation.NPJ Parkinson's disease · 2026Article
- Neuromodulatory Effects of Substantia Nigra Pars Reticulata Deep Brain Stimulation (SNr-DBS) in the 6-Hydroxydopamine Rat Model of Parkinson's Disease.Medicina (Kaunas, Lithuania) · 2026Article
Corrections and comments
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Authors and funding
20 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundFreezing of gait (FoG) is a debilitating symptom of Parkinson's disease (PD) with limited response to dopaminergic medication and subthalamic deep brain stimulation (STN-DBS). Substantia nigra pars reticulata (SNr) stimulation could improve FoG.
objectiveTo analyze the effect of combined STN-SNr stimulation at different frequencies on FoG.
methodsWe performed a double-blind, cross-over, randomized pilot trial involving STN-DBS treated PD patients with FoG. Participants received: high-frequency (HF) STN-DBS (S), combined HF-STN and SNr stimulation (C1), and combined HF-STN and low-frequency (LF) SNr stimulation (C2), for one month each. The primary endpoint was the score change in the New-Freezing-of-Gait-Questionnaire (NFOG-Q). Secondary analyses were performed on motor complications, axial symptoms, daily living activities, psychiatric symptoms, sleep, and patient preference.
resultsFifteen patients received at least one combined stimulation. No significant difference in NFOG-Q scores was found between S, C1, and C2; one-third of patients showed a clinically significant improvement (≥8 points) with combined stimulations. Motor complications improved significantly with C1 and C2 (C1-S: 3.6 ± 3.8 vs. 4.9 ± 3.8, p = 0.046; C2-S: 2.7 ± 3.1 vs. 4.9 ± 3.8, p = 0.005). 80% of patients preferred the combined STN-SNr stimulation while blinded. All adverse events were manageable.
conclusionsOur study did not prove a statistically significant improvement in NFOG-Q with STN-SNr stimulation; however, one-third of patients experienced a clinically meaningful FoG improvement, and the majority preferred to maintain STN-SNr stimulation. STN-SNr stimulation was both safe and effective in addressing motor complications and improving sleep quality, highlighting the importance of further exploration into the effects of combined STN-SNr stimulation.
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