Rumph P F, Kincaid S A, Visco D M, Baird D K, Kammermann J R, West M S
Department of Anatomy and Histology, College of Veterinary Medicine, Auburn University, AL 36849, USA.
Vet Surg. 1995 Sep-Oct;24(5):384-9. doi: 10.1111/j.1532-950x.1995.tb01348.x.
When lameness occurs in a load-bearing limb, compensatory load adjustments are made in the other supporting limbs. The vertical component of the ground reaction force, as measured by force platform analysis, reflects these adjustments. This study describes the pattern of vertical ground reaction force redistribution during experimental, chronic hindlimb lameness in dogs. The peak and impulse of the vertical ground reaction force were measured and described in 13 dogs before, and at 2, 6, and 12 weeks after transection of the cranial cruciate ligament. These variables were compared among limbs. The vertical ground reaction force in the forelimbs did not change significantly during the course of the study. At 2, 6, and 12 weeks after surgery, means of peak vertical force in the limb that underwent surgery were 18.9%, 44.0%, and 61.3% respectively, of presurgical values. In the contralateral limb, corresponding values were 131.7%, 112.8% and 112.9% respectively. If one accepts the relationship of mechanical loading to musculoskeletal architecture and the now certain relationship between lameness and compensatory loading of other limbs, then the use of another limb of the same animal as a control is a potential study design flaw.
当承重肢体出现跛行时，其他支撑肢体会进行代偿性负荷调整。通过力平台分析测量的地面反作用力的垂直分量反映了这些调整。本研究描述了犬实验性慢性后肢跛行期间垂直地面反作用力的重新分布模式。在13只犬的前交叉韧带横断术前、术后2周、6周和12周测量并描述了垂直地面反作用力的峰值和冲量。对各肢体的这些变量进行了比较。在研究过程中，前肢的垂直地面反作用力没有显著变化。术后2周、6周和12周，手术肢体的垂直力峰值均值分别为术前值的18.9%、44.0%和61.3%。在对侧肢体中，相应的值分别为131.7%、112.8%和112.9%。如果认可机械负荷与肌肉骨骼结构的关系以及目前已确定的跛行与其他肢体代偿性负荷之间的关系，那么将同一动物的另一条肢体用作对照是潜在的研究设计缺陷。
