Clayton H M, Schamhardt H C, Willemen M A, Lanovaz J L, Colborne G R
Department of Large Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing 48824-1314, USA.
Am J Vet Res. 2000 Feb;61(2):197-201. doi: 10.2460/ajvr.2000.61.197.
To determine whether analysis of net joint moments and joint powers is a suitable technique for evaluation of mechanics and energetics of lameness in horses and to measure effects of superficial digital flexor tendinitis.
6 sound horses.
Horses were evaluated before (sound evaluation) and after (lame evaluation) induction of superficial digital flexor tendinitis in 1 forelimb by injection of collagenase. Recordings were made with an optoelectronic system and a force plate as horses trotted. Net joint moments and joint powers in the sagittal plane at each joint in the forelimbs during the stance phase were determined. Peak values were determined, and mechanical energy absorbed and generated at each joint was calculated. Comparisons were made between contralateral limbs during sound and lame evaluations.
Lame limbs had significant reductions in peak values for net joint moments on the palmar aspect of metacarpophalangeal (fetlock), carpal, and humeroulnar joints. Total energy absorbed was significantly lower at every joint in lame limbs, compared with compensating limbs.
Horses with superficial digital flexor tendinitis had significant differences between lame and compensating limbs for net joint moments and joint powers at all joints, indicating that the gait of horses with superficial digital flexor tendinitis is energetically inefficient. Assessment of net joint moments and joint powers is a useful tool in evaluating equine lameness.
确定分析净关节力矩和关节功率是否是评估马匹跛行力学和能量学的合适技术，并测量指浅屈肌腱炎的影响。
6匹健康马匹。
通过注射胶原酶在1个前肢诱发指浅屈肌腱炎之前（健康评估）和之后（跛行评估）对马匹进行评估。当马匹小跑时，使用光电系统和测力板进行记录。确定站立阶段前肢各关节矢状面的净关节力矩和关节功率。确定峰值，并计算每个关节吸收和产生的机械能。在健康评估和跛行评估期间对侧肢体之间进行比较。
跛行肢体的掌指（系关节）、腕关节和肱尺关节掌侧的净关节力矩峰值显著降低。与代偿肢体相比，跛行肢体每个关节吸收的总能量显著更低。
患有指浅屈肌腱炎的马匹，跛行肢体和代偿肢体在所有关节的净关节力矩和关节功率方面存在显著差异，表明患有指浅屈肌腱炎的马匹步态在能量利用上效率低下。评估净关节力矩和关节功率是评估马跛行的有用工具。
