Talo A, Hodgson B J
Am J Physiol. 1978 Apr;234(4):E430-8. doi: 10.1152/ajpendo.1978.234.4.E430.
Electrical activity of rabbit oviducts was recorded in vitro at 18, 24, and 68 h after injection of human chorionic gonadotropin. An array of eight suction electrodes 1-2 mm apart was moved sequentially to cover nearly the whole oviduct. The frequency of spike bursts, pacemaker frequency, percentage of nonpropagating bursts, and probability of propagating in the uterine direction varied steeply within a few millimeters along the oviduct. On the average, spreading was only slightly prouterine. Compared to 18 and 24-h, 68-h oviducts showed higher frequency of activity and longer distances of propagation, particularly in the isthmus. The activity extended to 65.8 and 69.6% of the distance from the fimbriae at 18 and 24 h, respectively, and at 68 h to 70.8% and 84.6% in those oviducts that contained and did not contain ova, respectively. Ova were recovered on the uterine side of the border of activity or in regions in which the percentage of nonpropagating bursts was high or, at 18 and 24 h, in segments containing local regions of inactivity. Apparently, frequency of activity, the degree to which propagation of activity deviates from randomness, and the length of the inactive area regulate the location of ova in the isthmus.
在注射人绒毛膜促性腺激素后18、24和68小时，对兔输卵管的电活动进行了体外记录。一组间距为1 - 2毫米的八个吸力电极依次移动，以覆盖几乎整个输卵管。沿着输卵管，在几毫米范围内，尖峰爆发频率、起搏器频率、非传播性爆发的百分比以及向子宫方向传播的概率变化很大。平均而言，传播仅略微偏向子宫。与18小时和24小时相比，68小时的输卵管显示出更高的活动频率和更长的传播距离，特别是在峡部。在18小时和24小时时，活动分别延伸至距伞端距离的65.8%和69.6%，而在68小时时，在含有卵子和不含卵子的输卵管中，活动分别延伸至70.8%和84.6%。卵子在活动边界的子宫侧或非传播性爆发百分比高的区域被回收，或者在18小时和24小时时，在含有局部无活动区域的节段中被回收。显然，活动频率、活动传播偏离随机性的程度以及无活动区域的长度调节了卵子在峡部的位置。
