Siegle M L, Ehrlein H J
Institute of Zoophysiology, University of Hohenheim, Stuttgart, Federal Republic of Germany.
Am J Physiol. 1987 Oct;253(4 Pt 1):G452-60. doi: 10.1152/ajpgi.1987.253.4.G452.
The aim of this study is to elucidate the nature of ileal interdigestive contractile patterns by the computerized analysis of the contraction spread and by videofluoroscopy. Conscious dogs equipped with closely spaced strain-gauge force transducers were used. Two patterns of repetitive, phasic contractions were recorded, migrating clusters and phase IIIs; both patterns consisted of repetitive, propagated contractions. Both patterns migrated aborad by sequential movement of contraction waves down the bowel. Consequently, the rate of migration of either of the entire patterns was slower than the propagation velocity of constituent, individual contraction waves. Both patterns differed in several parameters, especially the propagated contractions of the clusters spread over shorter distances (1.47 +/- 0.4 cm) than those of phase III (4.65 +/- 0.99 cm). Compared with these complex patterns, propagating power contractions represented single contractions that propagated aborad at the same velocity as the contraction waves of the complex patterns. All three patterns propelled luminal contents distally.
本研究的目的是通过对收缩传播的计算机分析和视频荧光检查来阐明回肠消化间期收缩模式的本质。使用配备了间距紧密的应变片式力传感器的清醒犬。记录到两种重复性、阶段性收缩模式，即移行性簇状收缩和Ⅲ相收缩；两种模式均由重复性、传播性收缩组成。两种模式均通过收缩波沿肠管向下的顺序移动而向远端移行。因此，任何一种整体模式的移行速率都比组成单个收缩波的传播速度慢。两种模式在几个参数上有所不同，尤其是簇状收缩的传播性收缩传播的距离（1.47±0.4厘米）比Ⅲ相收缩（4.65±0.99厘米）短。与这些复杂模式相比，推进性强力收缩代表单个收缩，其向远端传播的速度与复杂模式的收缩波相同。所有三种模式都将管腔内的内容物向远端推进。
