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Related Experiment Video

Updated: May 15, 2026

Experimental Methods to Study Human Postural Control

Experimental Methods to Study Human Postural Control

Published on: September 11, 2019

Inadequate interaction between open- and closed-loop postural control in phobic postural vertigo.

M Wuehr¹, C Pradhan, S Novozhilov

¹Department of Neurology, University of Munich, Marchioninistrasse 15, 81377 Munich, Germany. mail@maxw.de

Journal of Neurology

|December 25, 2012

Summary

This summary is machine-generated.

Phobic postural vertigo (PPV) involves altered postural control mechanisms. Patients with PPV exhibit disturbed open-loop control and impaired sensory feedback, impacting balance performance.

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Area of Science:

Neuroscience
Biomechanics
Vestibular System

Background:

Phobic postural vertigo (PPV) presents with subjective dizziness and postural imbalance.
Altered postural control strategies are implicated in PPV's disturbed postural performance.
Understanding these mechanisms is crucial for improved diagnostics and therapeutics.

Purpose of the Study:

To investigate the characteristics and interactions of open- and closed-loop postural control processes in PPV using stabilogram diffusion analysis (SDA).

Main Methods:

SDA and center of pressure (CoP) amplitude measures were used to analyze spatio-temporal CoP displacements.
Data were collected from 20 PPV patients and 20 age-matched healthy controls on a stabilometer platform under eyes-open and eyes-closed conditions.

Main Results:

Open-loop control mechanisms in PPV showed significantly higher diffusion activity (p < 0.001).
The interaction between open- and closed-loop processes was altered, with a lowered sensory feedback threshold (p = 0.010).
These alterations resemble those in healthy individuals under more challenging balance conditions (e.g., eyes-closed stance).

Conclusions:

Subjective imbalance in PPV is linked to distinct changes in the coordination of open- and closed-loop postural control mechanisms.
PPV patients demonstrate inadequate sensory feedback utilization during quiet stance, impairing postural performance.
These findings suggest increased anti-gravity muscle activity and co-contraction due to heightened conscious effort in maintaining stability.