Spontaneous motility of the cervix in cyclic and ovariectomized ewes and changes induced by exogenous hormones
- 1 September 1982
- journal article
- research article
- Published by Bioscientifica in Reproduction
- Vol. 66 (1), 317-326
- https://doi.org/10.1530/jrf.0.0660317
Abstract
Continuous recordings of the electrical and mechanical activities of the cervix were made. Two basic patterns of electrical signal, short spike bursts and long spike bursts, showed close mechanical relationships with the record of mechanical activity. Electrical activity was organized in myoelectrical complexes including the regular alternation of phases of irregular spiking activity and phases of regular spiking activity. The myoelectrical complexes of the cervix existed independently of the sexual status although the frequency of recurrence did vary. The highest frequency was recorded during the periovulatory period around estrus when each complex was synchronized with a similar pattern recorded from the uterine horns. At the end of the periovulatory period, the irregular spiking activity decreased, the myoelectrical complex pattern of the cervix and uterine horns consisting mainly of regular spiking activity at a high frequency until metestrus. During the luteal phase, only the cervix remained active, with myoelectrical complexes formed mainly by phases of regular spiking activity recurring at long intervals. This pattern was also recorded after ovariectomy in the absence of hormonal treatment.This publication has 4 references indexed in Scilit:
- Electromyographic evaluation of the spontaneous and drug-induced motility of the cervix in sheepJournal of Pharmacological Methods, 1982
- Evidence that cervical softening in the pregnant rat is independent of increasing uterine contractilityReproduction, 1981
- Duration of oestrus, ovulation rate, time of ovulation and plasma LH, total oestrogen and progesterone in Galway adult ewes and ewe lambsReproduction, 1981
- ANATOMY OF THE HUMAN UTERINE CERVIX, GROSS AND MICROSCOPIC*Annals of the New York Academy of Sciences, 1962