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Updated: Aug 8, 2026
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Experimental Methods to Study Human Postural Control
Published on: September 11, 2019
Parkinsonian deficits in sensory integration for postural control: temporal response to changes in visual input
Lesley A Brown1, Stephanie A Cooper, Jon B Doan
1Balance Research Laboratory, Department of Kinesiology, University of Lethbridge, Lethbridge, Alberta, Canada T1K 3M4. l.brown@uleth.ca
Parkinsonism & Related Disorders
|May 25, 2006
Summary
Parkinson's disease impairs postural control adaptation to visual changes. Patients with Parkinson's disease (PD) show prolonged sway after visual deprivation, unlike controls, indicating a sensory reorganization deficit.
Area of Science:
- Neuroscience
- Human Movement Science
- Clinical Neurology
Background:
- Postural control relies on integrating sensory information, primarily visual, vestibular, and somatosensory inputs.
- Parkinson's disease (PD) is a neurodegenerative disorder affecting motor control, potentially impacting sensory integration for balance.
Purpose of the Study:
- To investigate the impact of Parkinson's disease on the dynamic process of postural control adjustment when visual information is removed and restored.
- To determine if PD affects the time course of sensory reweighting for maintaining balance.
Main Methods:
- Twelve medicated Parkinson's disease (PD) patients and 12 age-matched controls (CTRL) performed quiet standing tasks.
- Visual feedback was manipulated: available (0-15s), deprived (15-30s), and restored (30-45s).
- Elliptical Sway Area (ESA) was analyzed across 5s time bins to assess postural control changes.
Main Results:
- Both groups exhibited increased Elliptical Sway Area (ESA) after visual deprivation.
- PD patients maintained significantly elevated ESA throughout the visual deprivation period, while controls returned to baseline.
- Neither group showed changes in ESA upon visual information restoration.
Conclusions:
- Parkinson's disease is associated with a deficit in the reorganization of sensory priorities for postural control.
- The basal ganglia may play a crucial role in integrating sensory information essential for maintaining postural stability.
- Findings suggest altered sensory processing in PD impacts dynamic balance adjustments.
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