中文摘要：

目的 分析双足鼠直立姿势的相关因素，探索可提高双足鼠模拟人类直立姿势效能的有效措施。方法 将双足鼠术后直立姿势相关事件与相应直立持续时间进行统计并进行Pearson相关性分析。探寻双足鼠直立相关因素。据此拟定可促进双足鼠站立的措施，设定措施组双足鼠。对比术后4．6周该组与普通双足鼠日均累计站立时间的差异，评估该措施对提高双足鼠模拟人类直立姿势效能的价值。结果 双足鼠直立姿势与食物最紧密相关，这种相关性随增龄逐渐减弱。采取间断提高食物悬空高度的措施后，措施组日均累计站立时间长于普通双足鼠。结论 双足鼠适应直立姿势是一个被动过程，悬空食物是其早期站立的主要诱因。通过间断提高食物悬空高度，可提高双足鼠模拟人类直立姿势的效能。

英文摘要：

Objective To analyze the related factors of upright posture of bipedal rats, and explore the effective measures that can improve the efficiency of bipedal rats＇ simulating human upright posture. Methods All the upright posture correlative events and corresponding standing lasting time at 1st, 2nd, 4th, and 6th week post-operation were summed up and Pearson correlation analysis was done to find upright correlative factors ofbipedal rats. Measures aimed to increase bipedal rats＇ standing were made out. Then, a ＂measure group＂ of bipedal rats was set up. By comparing daily mean total standing time at 4th and 6th week post-operation with normal bipedal rats, the value of the measure to improvehuman upright posture simulating effect was evaluated. Results Bipedal rats＇ upright posture was gssoeiated most tightly with hanging food. The correlation was weakened gradually with age gaining. The ＂measure group＂ showed longer daffy mean upright time than normal bipedal rats when the measure of higher hanging food was exerted.Conclusion It＇s a passive process of the bipedal rats adapting for upright posture and food is the leading inducement for its primary standing. Through raising food height discontinuously, the measure earl improve bipedal rats＇ human upright posture simulating efficiency.