Goldfarb B J, Simon S R
Arch Phys Med Rehabil. 1984 Feb;65(2):61-5.
A study of 24 patients with amyotrophic lateral sclerosis (ALS) was done to evaluate the relationship between the disease state and walking performance. Each was filmed with high speed cameras as he/she walked at free speed. Spatial position of points on the limbs were quantified from films with a digitizer and a computer. Velocity, cadence, stride length, timing parameters, and joint patterns of the lower extremity were calculated with these data. Both cadence and stride length were seen to decrease as velocity decreased. Patients spent less time on one leg (single limb stance) and more time on two legs during walking as velocity decreased. No relationship was found between walking parameters and pulmonary function, type of neurologic symptoms, or number of months since diagnosis. The clinical feature that correlated best with walking performance was lower extremity muscle strength. Stride length was decreased in the slower walkers by a decrease in hip excursion into flexion and extension, excessive knee flexion at initial contact, and diminished plantarflexion at weight release.
对24例肌萎缩侧索硬化症（ALS）患者进行了一项研究，以评估疾病状态与步行能力之间的关系。每位患者在自由速度行走时，用高速摄像机进行拍摄。用数字化仪和计算机从影片中对肢体上各点的空间位置进行量化。利用这些数据计算下肢的速度、步频、步长、时间参数和关节模式。随着速度降低，步频和步长均下降。随着速度降低，患者行走时单腿支撑时间减少，双腿支撑时间增加。未发现步行参数与肺功能、神经症状类型或诊断后月数之间存在关联。与步行能力相关性最好的临床特征是下肢肌肉力量。在步行较慢的患者中，步长缩短是由于髋关节屈伸活动度减小、初始接触时膝关节过度屈曲以及负重释放时跖屈减弱。
