Crosbie Jack, Alhusaini Adel A A, Dean Catherine M, Shepherd Roberta B
Clinical Rehabilitation Sciences Research Group, Faculty of Health Sciences, The University of Sydney, New South Wales, Australia.
Dev Neurorehabil. 2012;15(2):114-8. doi: 10.3109/17518423.2011.643927.
The study investigated associations between the active and passive mechanical properties of the calf muscle in children with cerebral palsy and the spatiotemporal features of their gait on both level ground and over stairs.
26 children with hemiplegic cerebral palsy (age 4 - 10 years) walked barefoot across a level ten metre pathway and a staircase. Walking speed, stride length and cadence were calculated and spasticity, maximum isometric strength, stiffness and hysteresis of the affected side calf muscle measured. Multiple linear regression was used to determine the associations among variables.
Walking speed and stride length were significantly associated with dorsiflexor muscle strength and the stiffness of the calf muscle, while stair ascent and descent speeds were significantly and inversely related to the amount of hysteresis displayed by the calf muscle.
Passive mechanical properties of the calf muscle are influential in gait performance in these children.
本研究调查了脑瘫儿童小腿肌肉的主动和被动力学特性与他们在平地和楼梯上步态的时空特征之间的关联。
26名偏瘫型脑瘫儿童（年龄4至10岁）赤足走过一条10米长的平地通道和一段楼梯。计算行走速度、步长和步频，并测量患侧小腿肌肉的痉挛程度、最大等长肌力、刚度和滞后现象。采用多元线性回归来确定变量之间的关联。
行走速度和步长与背屈肌力量及小腿肌肉的刚度显著相关，而上下楼梯的速度与小腿肌肉表现出的滞后量显著负相关。
小腿肌肉的被动力学特性对这些儿童的步态表现有影响。
