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

Pucik, Jozef; M, Saling; Lovas, Stanislav; Kucharík, Martin; Ondracek, Oldrich; Cocherová, Elena

doi:10.15598/aeee.v10i3.639

Cited by 4 publications

(7 citation statements)

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“…In our previous work [ 24 ], we have proved that moving scenes depicted in Figures 2(b) and 2(d) induce postural sway and imbalance. We have found similar potential in scenes shown in Figures 2(a) and 2(c) , especially in subjects with cognitive impairment.…”

Section: Resultsmentioning

confidence: 78%

“…On the other hand, line integral parameter, essentially equivalent to mean COP velocity, consistently shows increase due to stimulation in vast majority of the subjects for all moving scenes. In our previous study [ 24 ], effect of visual stimulation was more pronounced in LI parameter than RMS parameter. The LI parameter and additional velocity-based parameters were then used in quantitative description of postural responses in this work.…”

Section: Discussionmentioning

confidence: 91%

“…Camera position, look direction, and tilt are defined by three vectors in Virtual Reality Toolbox: CameraPosition , CameraDirection , and CameraUpVector . More detail on the scene composition and animation can be found in [ 24 ]. Animation defined in VRML uses Interpolators and TimeSensor nodes [ 25 ].…”

Section: Methodsmentioning

confidence: 99%

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Assessment of Visual Reliance in Balance Control: An Inexpensive Extension of the Static Posturography

Pucik

Lukac

et al. 2014

Journal of Medical Engineering

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Ability of humans to maintain balance in an upright stance and during movement activities is one of the most natural skills affecting everyday life. This ability progressively deteriorates with increasing age, and balance impairment, often aggravated by age-related diseases, can result in falls that adversely impact the quality of life. Falls represent serious problems of health concern associated with aging. Many investigators, involved in different science disciplines such as medicine, engineering, psychology, and sport, have been attracted by a research of the human upright stance. In a clinical practice, stabilometry based on the force plate is the most widely available procedure used to evaluate the balance. In this paper, we have proposed a low-cost extension of the conventional stabilometry by the multimedia technology that allows identifying potentially disturbing effects of visual sensory information. Due to the proposed extension, a stabilometric assessment in terms of line integral of center of pressure (COP) during moving scene stimuli shows higher discrimination power between young healthy and elderly subjects with supposed stronger visual reliance.

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Section: Resultsmentioning

confidence: 78%

Section: Discussionmentioning

confidence: 91%

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Assessment of Visual Reliance in Balance Control: An Inexpensive Extension of the Static Posturography

Pucik

Lukac

et al. 2014

Journal of Medical Engineering

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“…We created a custom MATLAB environment for the entire acquisition process. A detailed explanation of the apparatus and calculations can be found in our earlier study (Pucik et al, 2012). The force plate was developed by the Institute of Normal and Pathological Physiology, Slovak Academy of Sciences (Hlavacka et al, 1990) and produced two analog signals proportional to the COP deviations in the ML and AP directions.…”

Section: Methodsmentioning

confidence: 99%

Figure 4: Post-hoc t-tests comparing TP of COP between groups during pre-stimulus, stimulus, and post-stimulus periods.

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“…Measured COP positions were used to calculate the TP of the COP, RMS in the anteroposterior (RMS AP ), and RMS in the mediolateral (RMS ML ) directions. Standard equations were used to calculate the TP of the COP and RMS, and are explained in detail in our previous study (Pucik et al, 2012).…”

Section: Visual Stimulimentioning

confidence: 99%

Figure 3: Results of repeated measures ANOVAs of TP of COP.

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

Cited by 4 publications

References 0 publications

Assessment of Visual Reliance in Balance Control: An Inexpensive Extension of the Static Posturography

Assessment of Visual Reliance in Balance Control: An Inexpensive Extension of the Static Posturography

Figure 4: Post-hoc t-tests comparing TP of COP between groups during pre-stimulus, stimulus, and post-stimulus periods.

Figure 3: Results of repeated measures ANOVAs of TP of COP.

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