Department of Veterinary Surgery and Anesthesiology, School of Veterinary Medicine and Animal Science, Univ Estadual Paulista (UNESP), Botucatu, SP, Brazil.
BMC Vet Res. 2012 Jun 22;8:87. doi: 10.1186/1746-6148-8-87.
Understanding normal gait requires allowing for variations in normal patterns by the sex, age, and species in question. Therefore, the aim of this study was to evaluate kinetic and temporospatial parameters in clinically healthy sheep from three different age groups with a pressure-sensing walkway. The sheep were judged to be healthy based on the results of complete physical and orthopaedic examinations and had no history of lameness. Twenty-one clinically healthy female Santa Ines sheep were divided into three groups: G1 - seven animals, aged from 8 to 12 months and weighing 19.5-33 kg; G2 - seven individuals, aged from 2 to 4 years and weighing 26.5-42 kg; and G3 - seven sheep, aged more than 5 years and weighing 37.3-45 kg. The animals were examined from two directions: first on the left side and then on the right side of the handler. The data from the first five valid trials in each direction were collected for each sheep and analysed using the designated software. A trial was considered valid if the sheep walked within the correct velocity (1.1-1.3 m/s) and acceleration (from -0.15 to 0.15 m/s2) ranges. The peak vertical force (PVF), vertical impulse (VI), gait cycle time, stance time, swing time, stride length, and the percentage body weight distribution among the four limbs were determined.
No significant differences were observed, in either the forelimbs or the hind limbs, between the left and right sides or between the two directions for any of the variables. No significant temporospatial differences were found among the groups. Significant PVF (%BW) differences were observed in the forelimbs (G1>G3) and hind limbs (G1>G3), and significant VI differences were observed in the forelimbs (G1>G3).
Young healthy sheep differ from older sheep in the vertical forces they create when walking at the same velocity on a pressure-sensing walkway.
理解正常步态需要考虑到所研究的性别、年龄和物种的正常模式变化。因此，本研究的目的是使用压力感应步态分析系统评估来自三个不同年龄组的临床健康绵羊的运动学和时间-空间参数。这些绵羊根据全面的体格检查和骨科检查结果被判断为健康，并且没有跛行史。21 只临床健康的 Santa Ines 绵羊被分为三组：G1-7 只动物，年龄为 8-12 个月，体重为 19.5-33kg；G2-7 只个体，年龄为 2-4 岁，体重为 26.5-42kg；G3-7 只绵羊，年龄大于 5 岁，体重为 37.3-45kg。动物从两个方向进行检查：首先是从操作者的左侧，然后是右侧。对每只绵羊每个方向的前五次有效试验的数据进行收集，并使用指定的软件进行分析。如果绵羊在正确的速度（1.1-1.3m/s）和加速度（从-0.15 到 0.15m/s2）范围内行走，则试验被认为是有效的。确定了峰值垂直力（PVF）、垂直冲量（VI）、步态周期时间、站立时间、摆动时间、步长以及四肢之间的体重分布百分比。
在任何变量中，无论是前肢还是后肢，无论是左侧还是右侧，或者在两个方向之间，都没有观察到显著差异。各组之间也没有观察到时间-空间差异。在前肢（G1>G3）和后肢（G1>G3）中观察到显著的 PVF（%BW）差异，在前肢中观察到显著的 VI 差异（G1>G3）。
在压力感应步态分析系统上以相同速度行走时，年轻健康的绵羊与年长的绵羊在垂直力方面存在差异。
