Difference in the Static Postural Control according to the Subjective Visual Vertical Deviation and Head Orientations
10.18857/jkpt.2023.35.5.156
- Author:
Sang Soo LEE
1
;
Sang Seok YEO
Author Information
1. Department of Health, Graduate School, Dankook University, Cheonan, Republic of Korea
- Publication Type:Original Article
- From:
Journal of Korean Physical Therapy
2023;35(5):156-161
- CountryRepublic of Korea
- Language:English
-
Abstract:
Purpose:This study examined the effects of subjective visual vertical perception and head orientation on static balance control.
Methods:The subjects were 25 young and healthy adults. The vertical perception was measured using a subjective visual vertical (SVV), and the Center of pressure (COP) parameter was analyzed by continuously measuring the movement of the COP to determine the changes in static postural control. The group was divided based on a deviation of 3° in SVV (11 of SVV≥3°, 14 of SVV<3°) and measured with different head orientations: front, up, down, left, and right in the upright and tandem positions, respectively.
Results:In the upright position, the SVV≥3° group had significantly larger values for all COP parameters (Sway length, Surface, Delta X, Delta Y, and Average speed) compared to the SVV<3° group (p<0.05). In the tandem stance, only the Ellipse Surface value was significantly larger among the COP parameters in the group with SVV≥3° compared to the group with SVV<3°(p<0.05). In contrast, the other COP parameters were not significantly different (p>0.05). The effects of static balance control on the head orientation were not statistically significant (p>0.05), and the interactions between the subjective vertical perception and head orientation were not significant (p>0.05).
Conclusion:These results suggest that pathological deviations in SVV are associated with impaired static balance performance. This study can provide a therapeutic rationale for using visuospatial cognitive feedback training to improve the static balance.
