Germain G, Cabrol D, Visser A, Sureau C
Am J Obstet Gynecol. 1982 Mar 1;142(5):513-9. doi: 10.1016/0002-9378(82)90753-0.
Electromyographic activity in six pregnant cynomolgus monkeys was recorded in vivo by means of bipolar electrodes individually attached to the surface of the uterine corpus. These data were compared with recordings of intra-amniotic pressure obtained simultaneously by means of an open-ended, fluid-filled catheter placed in the amniotic cavity. During the last third of pregnancy, the electromyograms showed recurrent electrical complexes (trains of potentials, TOP) which lasted for about 2 minutes and whose rate of occurrence varied during the nyctohemeral period. The initiation of electrical activity in various uterine areas was always synchronous with and was related to mechanical contraction. The complex, polyphasic contractions that were observed can be explained, largely, by the variations of potentials within a train of potentials. However, a simple quantitative relationship between the mean frequency of the potentials within the TOP and the mean amplitude of the change in pressure could not be demonstrated. In contrast to data available on the woman, the increase in contractile strength at the onset of labor in the macaque appears to be due to a higher frequency of excitation of individual cells rather than the result of an improved functional coordination between the active muscular elements.
通过将双极电极分别附着于子宫体表面，在体记录了6只怀孕食蟹猴的肌电活动。这些数据与通过置于羊膜腔内的开放式充液导管同时获得的羊膜腔内压力记录进行了比较。在妊娠后期，肌电图显示出反复出现的电复合体（电位序列，TOP），持续约2分钟，其出现频率在昼夜期间有所变化。不同子宫区域电活动的起始总是与机械收缩同步并与之相关。观察到的复杂多相收缩在很大程度上可以通过电位序列内电位的变化来解释。然而，无法证明TOP内电位的平均频率与压力变化的平均幅度之间存在简单的定量关系。与关于人类的现有数据相反，猕猴分娩开始时收缩强度的增加似乎是由于单个细胞兴奋频率较高，而不是活跃肌肉元件之间功能协调性改善的结果。
