Contractile effect of acetylcholine on isolated isthmic segment of fallopian tubes.

The Fallopian tubes are sparsely innervated with cholinergic nerve fibers. Acetylcholine is released from these nerves and contracts the smooth muscles of the tubes. The aim of our study was to investigate the effect of acetylcholine on the isthmic segment of the Fallopian tubes using selective antagonists in different hormonal settings.

Contractile effect of acetylcholine on isolated ampullar segment of Fallopian tubes.

The Fallopian tubes are scarcely innervated with cholinergic nerve fibers. Acetylcholine released from these nerves contracts smooth muscles of the tubes. The aim of our study was to investigate the effect of acetylcholine on the Fallopian tubes using selective antagonists in different hormonal settings.

Relaxant effect of oxytocin on isolated human oviduct.

Aim: Oxytocin produces concentration-dependent relaxation of isolated isthmus and ampulla of human oviduct precontracted by histamine. The aim of our study was to investigate whether this oxytocin effect was specific and by which receptors it was mediated.

Methods: We investigated effects of oxytocin and its antagonists on isolated isthmus and ampulla of the uterine tubes from 20 women who underwent surgery for uterine fibroids.

[Neurohumoral regulation of Fallopian tube motility].

Motility of Fallopian tubes is essential for transport of ova from peritoneal cavity uterus. Numerous substances were found to affect motility of the tubes. Catecholamines cause both relaxation and contraction isolated Fallopian tubes; it depends on type of receptor they bind for.