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Factors influencing pelvic and trunk motions during one-leg standing

Other Titles
 한발서기 시 골반과 체간 동작에 영향을 주는 요인 
Authors
 김태호 
Issue Date
2010
Description
Dept. of Rehabilitation Therapy/박사
Abstract
One-leg standing (OLS) test has been used to assess not only balance ability but also lumbopelvic stability in the clinical field. The purposes of this study were to define the normal motion of the pelvic and trunk motions, to identify their relationship, and to determine the factors that influenced the pelvic and trunk motions during OLS in healthy young subjects. Eighty healthy participants volunteered for this study. Anthropometric data were recorded, and the maximal isometric muscle strength of the hip and trunk were measured with an isokinetic device. The pelvic and trunk motions were measured using a three-dimensional motion analysis system, and muscle activity of hip and abdominal muscles was recorded with surface electromyography (EMG) during OLS. Pearson correlation was used to identify correlation between the pelvic and trunk motions. Stepwise multiple regression was used to find the predictor variables that affected pelvic and trunk motions during OLS. There were significant correlations between the pelvic and trunk motions during OLS. Factors influencing the pelvic lateral shift were the foot length, the ratio of the hip abductor/adductor strength in the stance side, and the external oblique activity in the lift side (R2=0.22). The tensor fasciae latae (TFL) length in the stance side and the ratio of the hip external/internal rotator strength of the stance side were factors found to have a significant influence on pelvic rotation (R2=0.18). Factors influencing the trunk lateral shift were gluteus medius activity in the stance side, the external oblique activity in the lift side, the foot length, and the ratio of the hip abductor/adductor strength in the stance side (R2=0.27). The TFL length in the stance side was the only factor found to have a significant direct influence on trunk rotation (R2=0.14).This study indicates that both pelvic and trunk motions should be considered during the OLS test as a determinant of movement dysfunction in lumbopelvic stability. Additionally, this study suggests that the muscle activity of the external oblique and gluteus medius, the ratio of hip abductors/adductors strength, and the ratio of hip external/internal strength, and the length of TFL should all be included in both the evaluation and treatment of lumbopelvic stability.
Files in This Item:
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Appears in Collections:
1. College of Medicine (의과대학) > Others (기타) > 5. Others
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/137399
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