Experimental System for Investigation of Visual Sensory Input in Postural Feedback Control

The human postural control system represents a biological feedback system responsible for maintenance of upright stance. Vestibular, proprioceptive and visual sensory inputs provide the most important information into the control system, which controls body centre of mass (COM) in order to stabilize...

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Bibliographic Details
Published in:Advances in electrical and electronic engineering 2012-09, Vol.10 (3), p.174-180
Main Authors: Pucik, Jozef, Saling, Marian, Lovas, Stanislav, Kucharik, Martin, Ondracek, Oldrich, Cocherova, Elena
Format: Article
Language:English
Subjects:
balance
centre of pressure
force platform
postural control
posturography
stabilometry
virtual reality
visual stimulation
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Summary:The human postural control system represents a biological feedback system responsible for maintenance of upright stance. Vestibular, proprioceptive and visual sensory inputs provide the most important information into the control system, which controls body centre of mass (COM) in order to stabilize the human body resembling an inverted pendulum. The COM can be measured indirectly by means of a force plate as the centre of pressure (COP). Clinically used measurement method is referred to as posturography. In this paper, the conventional static posturography is extended by visual stimulation, which provides insight into a role of visual information in balance control. Visual stimuli have been designed to induce body sway in four specific directions - forward, backward, left and right. Stabilograms were measured using proposed single-PC based system and processed to calculate velocity waveforms and posturographic parameters. The parameters extracted from pre-stimulus and on-stimulus periods exhibit statistically significant differences.
ISSN:1336-1376
1804-3119
DOI:10.15598/aeee.v10i3.639