Neural Noise

DBS neurofeedback and IMU-based UPDRS movement quality metrics in Parkinson's disease

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  • Lower-limb motor effects of DBS neurofeedback in Parkinson’s disease can be assessed with IMU-based UPDRS movement quality metrics.1
  • Neurofeedback in a DBS context with objective motor outcomes is directly relevant to closed-loop neuroprosthetics and adaptive stimulation.1
  • The work was reported in Nature and is tier-1 for clinical neurophysiology.1 1

Weekly enrichment (2026-07-20)

  • Published in Scientific Reports (2025, Salzmann et al.), the study tested whether a single session of DBS-based neurofeedback improves movement quality in Parkinson’s disease, quantified with wearable inertial measurement units (IMUs).2
  • Cohort: 10 PD patients with implanted STN-DBS (mean age 60 ± 12 years, four female), each completing three one-minute neurofeedback training blocks to voluntarily downregulate subthalamic beta-power (13-30 Hz) read from local field potentials via Medtronic BrainSense.2
  • Two standardized MDS-UPDRS III tasks were assessed before versus after neurofeedback: seated foot stomping (lower limb) and hand pronation-supination (upper limb).2
  • Beta-power fell -12.42% on average (maximum -30.59%, achieved mainly via motor-imagery strategies); the reduction between the first and third training blocks was significant (W = 3.0, p = 0.039), strengthening to W = 1.0, p = 0.016 after excluding two non-responders (P01, P09; N=8).2
  • Lower-limb gains (N=10): steps per second +5.7% (p = 0.010), mean peak velocity +36.1% (p = 0.002), acceleration magnitude +14.5% (p = 0.037), and shorter step intervals -4.5% (p = 0.020).2
  • No significant improvements were observed in the upper-limb hand pronation-supination task.23
  • Larger beta reductions predicted larger speed gains across responders (change-score Spearman ρ = 0.976, 95% CI [0.795, 1.000], p < 0.001, N=8), indicating tight neural-behavioral coupling.2
  • Implication: neurofeedback-driven self-regulation of pathological beta can translate into objective lower-limb motor benefit, supporting closed-loop/adaptive DBS and wearable-sensor outcome metrics, though durability beyond a single session remains untested.23

Footnotes

  1. https://news.google.com/rss/articles/CBMiX0FVX3lxTE5LSDRPUktwTUxqN2FXVGVXeWpCaHRicmNmX2Y3ZmlLUzlsOThQS3dRUlJfcVA3cHRwRUFwb3pqZEdEcVU1RTJrVG1UeTlxajN4OTU2cXYzY0ZvMGxad1hF?oc=5 ↩ ↩2 ↩3 ↩4

  2. https://www.nature.com/articles/s41598-025-28378-8 ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8

  3. https://znznews.ch/effects-of-neurofeedback-in-parkinsons-disease/ ↩ ↩2

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