[논문]노인의 정적인 자세로부터 장애물 보행 시 장애물 높이의 변화가 평형감각에 미치는 효과

김형동

노인의 정적인 자세로부터 장애물 보행 시 장애물 높이의 변화가 평형감각에 미치는 효과
The Effect of Obstacle Height on Balance Control While Stepping Over an Obstacle From a Position of Quiet Stance in Older Adults 원문보기

대한물리치료학회지 = The journal of Korean Society of Physical Therapy, v.21 no.3, 2009년, pp.75 - 80

김형동 (대구가톨릭대학교 물리치료학과)

Abstract ▼ AI-Helper

Purpose: The purpose of this study was to examine the effect of an obstacle height on the balance control of older adults while stepping over an obstacle from a position of quiet stance. Methods: Fifteen community-dwelling healthy older adults (mean age, $74.4\pm4.27$ yrs; age range, 67-82 yrs) volunteered to participate in this study. The subjects performed gait initiation (GI) and they stepped over obstacles of two different heights (10 cm and 18 cm) at a self-paced speed from a position of quiet stance. Their performance was assessed by recording the changes in the displacement of the COP in the anteroposterior (A-P) and mediolateral (M-L) directions using a force platform. Results: The M-L displacement of the COP significantly increased for an 18 cm obstacle height condition as compared to the GI and a 10 cm obstacle height condition (p<0.01). Furthermore, the M-L displacement of the COP for a 10 cm high obstacle was significantly greater for that for the GI (p0.05). Conclusion: This study suggests that the M-L COP displacement could be a better parameter to identify the dynamic balance control in older adults when negotiating obstacles.

주제어

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문제 정의

^12‐14 However, these studies have mostly focused on unobstructed level walking, but not the process of actually crossing an obstacle. The purpose of this study was to examine the effect of obstacle height on balance control while stepping over an obstacle from a position of quiet stance in healthy older adults.
The purpose of this study was to examine the relationship between obstacle height and the COP trajectory when older adults negotiate obstacles of different heights. The elderly subjects differently modulated the M‐L displacement of the COP magnitude while stepping over obstacles of different height or initiating gait.

제안 방법

Comparisons of the COP data between GI, stepping over a 10 cm high obstacle, and stepping over an 18 cm high obstacle were analyzed for the A‐P and M‐L displacement of the COP. There was a significant difference between the stepping conditions for the M‐L displacement of the COP (p<0.
0 software (Advanced Mechanical Technology, Inc, Watertown, MA, USA). Two different obstacles (10 cm in height, 10 cm in depth and 140 cm in width and 18 cm in height, 10 cm in depth and 140 cm in width, respectively) were used for obstacle clearance.

데이터처리

One‐way repeated analysis of variance (ANOVA) was used to determine the main effects. In case of significance paired contrast analyses were conducted.

성능/효과

However, the A‐P COP displacement did not change as the obstacle height increased. These findings suggest that the M‐L COP displacement could be a better parameter to identify dynamic balance control when negotiating obstacles as compared to the A‐P displacement of COP. The results also suggest that an investigation of the COP trajectory could be an important tool to measure the mechanisms of normal and/or pathological gait patterns or age‐related changes of gait.

후속연구

Furthermore, the participants in this study were of a high functional level; thus, the study population may not be representative of community dwelling older adults who have mobility deficits. Finally, future studies should explore COP trajectory behavior in a wide variety of clinical populations, such as subjects with neurological and orthopedic deficits or diseases as well as a diverse set of activities.

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