Arhan P, Faverdin C, Persoz B, Devroede G, Dubois F, Dornic C, Pellerin D
J Appl Physiol. 1976 Nov;41(5 Pt. 1):677-82. doi: 10.1152/jappl.1976.41.5.677.
Viscoelastic properties of the rectal wall and anal sphincter pressure were studied simultaneously in 25 normal children. During rectal distension for 60 s, with varying volumes of air, the rectal pressure varied as the sum of two exponential functions of the time plus an asymptotic constant. A rectoanal inhibitory reflex was elicited during these distensions. The exponential decrease of the rectal pressure corresponded exactly to the return of the upper anal canal pressure to the resting value in some subjects. In others, the upper anal canal remained relaxed as long as the rectal ampulla was distended, except with smaller volumes. The results obtained may be explained by an analogical rheological linear model.
对25名正常儿童同时进行了直肠壁的粘弹性特性和肛门括约肌压力的研究。在直肠扩张60秒期间，随着空气量的变化，直肠压力随时间的两个指数函数之和加上一个渐近常数而变化。在这些扩张过程中引发了直肠肛门抑制反射。在一些受试者中，直肠压力的指数下降与肛管上部压力恢复到静息值完全对应。在另一些受试者中，只要直肠壶腹扩张，肛管上部就保持松弛，除了空气量较小时。所获得的结果可用一个类似的流变学线性模型来解释。
