Karimi Mohammad, Esrafilian Amir
Rehabilitation Faculty, Isfahan, Iran.
Prosthet Orthot Int. 2013 Feb;37(1):22-9. doi: 10.1177/0309364612446649. Epub 2012 Jun 8.
Stability during standing is achieved by a complex coordination process between various human systems. The stability of normal subjects and patients with various neuromuscular disorders has been evaluated by common methods based on force plate data analysis for one minute. However, most of the people frequently stand for a prolonged period during daily activities.
This study aimed to evaluate the stability of subjects during a longer period of time. Moreover, the new method was introduced to analyze the stability of subjects with musculoskeletal disorders.
Experimental.
Four groups of normal adults and children, individuals with spinal cord injury (SCI) and Perthes disease were recruited in this study. Stability of the subjects was evaluated by using parameters collected from centre of pressure (COP) sways obtained while subjects standing on force plate for one and then five minutes based on the old and new methods. Two sample t-test was used to compare the stability of the subjects by the commonly used method. The number of stable to unstable frames was selected for final analysis based on the new method.
Based on the traditional method, the SCI and Perthes patients were more stable than normal subjects (p < 0.05). Moreover, children were more unstable in the anteroposterior plane than adults. However, based on the new method, SCI and patients with Perthes disease were more unstable than normal adults. Moreover, in mediolateral direction the results of stability analysis with the new method differed from that of the traditional method.
The new method of stability analysis seems to be more sensitive and accurate than that of the traditional commonly used method. Based on the new method, stability is the ability of a subject to return from an unstable position to a stable one and to remain in a stable one for a certain period of time. Clinical relevance The results of this research can be used by most clinicians to evaluate the stability of subjects with various musculoskeletal disorders.
站立时的稳定性是通过人体各系统之间复杂的协调过程实现的。正常受试者和患有各种神经肌肉疾病的患者的稳定性已通过基于测力板数据分析一分钟的常用方法进行了评估。然而，大多数人在日常活动中经常会长时间站立。
本研究旨在评估受试者在更长时间段内的稳定性。此外，引入了新方法来分析患有肌肉骨骼疾病的受试者的稳定性。
实验性研究。
本研究招募了四组正常成年人、儿童、脊髓损伤（SCI）患者和佩特兹病患者。基于新旧方法，通过使用受试者站在测力板上一分钟然后五分钟时获得的压力中心（COP）摆动所收集的参数来评估受试者的稳定性。使用两样本t检验通过常用方法比较受试者的稳定性。基于新方法选择稳定帧与不稳定帧的数量进行最终分析。
基于传统方法，SCI患者和佩特兹病患者比正常受试者更稳定（p < 0.05）。此外，儿童在前后平面上比成年人更不稳定。然而，基于新方法，SCI患者和佩特兹病患者比正常成年人更不稳定。此外，在内外侧方向上，新方法的稳定性分析结果与传统方法不同。
新的稳定性分析方法似乎比传统常用方法更敏感、准确。基于新方法，稳定性是受试者从不稳定位置恢复到稳定位置并在稳定位置保持一定时间的能力。临床意义：本研究结果可供大多数临床医生用于评估患有各种肌肉骨骼疾病的受试者的稳定性。
