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Quantifying repeatability of the Wartenberg pendulum test parameters in children with spasticity.

Malgorzata Syczewska1, Maria K Lebiedowska, Anand D Pandyan

  • 1Department of Paediatric Rehabilitation, The Children's Memorial Health Institute, Warsaw, Poland. m.syczewska@czd.pl

Journal of Neuroscience Methods
|February 3, 2009
PubMed
Summary

The Wartenberg (pendulum) test shows good repeatability in groups with spasticity but high variability in individuals. This limits its clinical use for monitoring spasticity changes over time.

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Area of Science:

  • Neurology
  • Rehabilitation Medicine
  • Biomedical Engineering

Background:

  • The Wartenberg (pendulum) test is widely used to assess neurological conditions.
  • Evidence suggests it can differentiate healthy individuals from those with spasticity.
  • Understanding the test's repeatability is crucial for its clinical application.

Purpose of the Study:

  • To explore the within-session repeatability of relaxation indices derived from the Wartenberg test.
  • To assess the reliability of these measures when performed by a single investigator.
  • To evaluate the clinical utility of the Wartenberg test for monitoring spasticity.

Main Methods:

  • The Wartenberg test was performed on 21 children with spasticity.
  • Knee motion was measured using a VICON motion system after passive leg drop.

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  • Relaxation indices and maximum velocity were calculated from four consecutive trials per session.

    • Main Results:

    • Relaxation indices showed no statistically significant difference between trials in the patient group.
    • However, high within-session variability (16-90%) was observed in individual patients.
    • Findings did not align with previous reports of systematic, time-dependent changes.

    Conclusions:

    • The Wartenberg test demonstrates group-level repeatability but lacks individual patient repeatability.
    • The substantial variability in relaxation indices may limit its clinical usefulness for tracking spasticity.
    • Further research is needed to explain this variability and validate its use as a clinical assessment tool.