Moravec S J, Cleall J F
University of Illinois, College of Dentistry, Department of Orthodontics, Chicago 60612.
Am J Anat. 1987 Dec;180(4):357-64. doi: 10.1002/aja.1001800406.
Alteration in posture was examined following foreleg amputation in rats. After the surgical induction of bipedal stance, a detailed, quantified, and longitudinal assessment of rat posture and the amount of time spent in the upright stance was undertaken. An experimental group of rats had both forelimbs amputated. A group of unaltered quadrupedal rats served as controls. A standardized series of photographs of altered and control rats was taken. Postural differences between the two groups of rats were analyzed through photographic analysis of their profiles in upright and in crouched positions. Analysis of the photographs showed that the percentage of rats assuming upright posture did not differ between the experimental and control groups. Foreleg amputation forced the rats to adopt an altered posture, but did not result in habitual assumption of upright stance to a greater degree than that of controls. Adaptation to bipedalism was marked by a tucking of the hindlimbs under the body, and a flexure of the vertebral column and the head.
在大鼠前肢截肢后检查其姿势变化。在通过手术诱导双足站立后，对大鼠姿势以及直立姿势所花费的时间进行了详细、量化和纵向评估。一组实验组大鼠的双侧前肢均被截肢。一组未改变的四足大鼠作为对照。拍摄了实验组和对照组大鼠的一系列标准化照片。通过对两组大鼠直立和蹲伏姿势侧面的照片分析，分析了两组大鼠的姿势差异。照片分析表明，实验组和对照组中呈现直立姿势的大鼠百分比没有差异。前肢截肢迫使大鼠采取改变后的姿势，但并没有导致其比对照组更频繁地习惯性采取直立姿势。适应双足行走的特征是后肢向身体下方收拢，以及脊柱和头部弯曲。
