研究炎症反应时,常测量大鼠后蹠体积以研究肿胀。本文报道,注射不含菌体的油(液体石蜡)后,足蹠体积改变呈现一种七日周期的生物节律。实验用种系很纯的SK Wistar 大鼠,恒温恒光照,测量亦定时。后蹠在距骨隆凸处作记号,以水银容积作客观和准确的容积测定;10只鼠重复测定时,平均数误差小于0.5%。试验共进行5周。节律性用方程式Y_t=M+Acos(Wt+ When studying the inflammatory response, the posterior plantar volume is often measured in rats to investigate swelling. This article reports that, after injection of cell-free oil (liquid paraffin), changes in plantar volume showed a seven-day cycle of the biological rhythm. Experiments with very pure seed germ line SK Wistar rats, constant temperature and constant light, the measurement is also timing. Posterior metatarsal talar protuberance at the mark, the mercury volume for objective and accurate volume determination; 10 mice repeated measurements, the average error of less than 0.5%. The trial lasted 5 weeks. Rhythm with the equation Y_t = M + Acos (Wt +