Livability and mean total upright posture time of each bipedal rat group on the day of 5,6,7,9,11,13 weeks age were counted and compared to evaluate the influence on the upright-posture-simulating effect by different operation times.

• 对比各组双足鼠存活率以及生长至5、6、7、9、11、13周龄时双足鼠日均累计站立时间的差异,评价不同建模时机对双足鼠模拟人类直立姿势效果的影响。