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Related Concept Videos

Applications of Logarithms01:28

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Related Experiment Video

Updated: Jan 4, 2026

Computerized Dynamic Posturography for Postural Control Assessment in Patients with Intermittent Claudication
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Frequency analyses of posturography using logarithmic translation.

Hiroki Watanabe1, Ayane Makabe1, Chiaki Hirai1

  • 1Department of Otolaryngology, Tokyo Medical and Dental University, Tokyo, Japan.

Acta Oto-Laryngologica
|November 12, 2019
PubMed
Summary

Logarithmic power-spectral analysis of posturography reveals age- and disease-specific patterns in postural control. This method offers a clear way to assess balance in the elderly and patients with spinocerebellar degeneration (SCD).

Keywords:
Posturographyageinglogarithmicpower-spectralspinocerebellar degeneration

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Area of Science:

  • Biomechanics
  • Neurology
  • Geriatrics

Background:

  • Posturography's center of pressure (CoP) frequencies typically show exponential distributions.
  • Logarithmic translation linearizes these distributions for easier analysis.

Purpose of the Study:

  • To evaluate the clinical utility of logarithmic frequency analysis in posturography.
  • To assess balance in healthy individuals, the elderly, and patients with spinocerebellar degeneration (SCD).

Main Methods:

  • Analyzed power-spectral data of CoP using maximum entropy method in 172 healthy subjects and 47 SCD patients.
  • Performed posturography with eyes open/closed and on foam/stable surfaces.
  • Applied logarithmic translation for quantitative evaluation.

Main Results:

  • Teenagers showed high-frequency fluctuations linked to immature postural control.
  • Elderly subjects exhibited distinct patterns related to sensory input, with reduced vestibular contribution.
  • Differences in power-spectral distributions were observed between healthy individuals and SCD patients.

Conclusions:

  • Logarithmic power-spectral analysis provides age- and disease-specific insights into postural control.
  • This method offers a novel, visually comprehensible parameter for managing balance disorders.