Electrical Activity of Oviducts in vivo

Larks, Saul D.; Larks, Golda G.; Hoffer, Richard E.; Charlson, E. J.

doi:10.1038/234556a0

Cited by 7 publications

(4 citation statements)

References 1 publication

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“…This observation was supposed to have a bearing on the ovum transport through the AIJ, but the data were obtained with intraluminal catheters which obstruct the lumen and therefore they could not be related to normal AIJ functioning. Other findings [7] show that in the AIJ region the electrical activity is periodic. This suggests that there is likely to be periodicity in the AIJ activity.…”

Section: Introductionmentioning

confidence: 91%

Dynamics of the Ampullary-Isthmic Junction in Rabbit Oviduct

Anand¹,

Guha²

1982

Gynecol Obstet Invest

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A delay in the ovum transport at the ampullary-isthmic junction (AIJ) has been confirmed by various investigators, but the mechanism of retention and release at this junction is not yet well understood. Using a technique for monitoring unobstructed Fallopian tube motility with an impedance plethysmograph, an increase in luminal diameter was observed at the time when the ova are released from the AIJ. This enlargement persists till all ova emerge from the AIJ. Hence, it seems likely that the AIJ relaxation is a dominant factor contributing to ova release from the AIJ.

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Section: Introductionmentioning

confidence: 91%

Dynamics of the Ampullary-Isthmic Junction in Rabbit Oviduct

Anand¹,

Guha²

1982

Gynecol Obstet Invest

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“…The usefulness of this transducer is limited by its short lifetime (average 12 days) and also by the relative difficulty of application which would tend to limit the feasibility of multiple point monitoring. (31) Physiology of the Oviduct 135…”

Section: Mercury Strain Gaugementioning

confidence: 99%

Methods for Studying Oviductal Physiology

Blandau¹,

Boling²,

Halbert³

et al. 1975

Gynecol Obstet Invest

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In studying oviductal physiology, it is important to sort out the complex interrelationships between muscle, cilia, nerves and secretory processes as they each of themselves, or in concert, effect gamete transport. In this review, a variety of physiological techniques and bioengineering approaches which have been used to monitor contractile and ciliary activity, are described and critically evaluated.

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“…Ovarian steroids modify the activity of these receptors since they increase the noradrenaline content of the isthmus (Bodkhe & Harper, 1972a, b). In goats, pronounced electrical activity and groups of positive pulses occur during oestrus, and sets of negative pulses dominate during dioestrus (Larks, Larks, Hoffer & Charlson, 1972). In women, local release of adrenergic amines may evoke outbursts of increased oviducal muscular activity (Coutinho & Maia, 1969).…”

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confidence: 99%

Cyclical Changes in Utero-Oviducal Motility in the Rabbit

Aref¹,

Hafez²

1973

Reproduction

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The phasic activities of utero-oviducal musculature are co-ordinated to accomplish successful gamete transport. In untreated rabbits, the oviducal musculature shows dramatic daily changes in contractility (Salomy & Harper, 1971). In oestrogen-treated rabbits, contractions are characterized by high frequency, small amplitude and irregular pattern (Mattos & Coutinho, 1971). This oestrogen-dominated pattern is observed with either high or moderate doses of the steroid (Greenwald, 1963). During the luteal phase, the oviducal musculature becomes increasingly active (Boling, 1971) in response to increasing progestagen concentrations. Maximal contractility of the myometrium occurs during the preovulatory phase, and a`m yometrial block' (Csapo, 1970) is established during the luteal phase.A chronological study of the characteristic motility patterns may provide a further understanding of their physiological implications. The purpose of this investigation was to study cyclical changes in the activity of musculature of the oviduct and uterus in the rabbit during the transport of gametes.Balloon-ended, fluid-filled, polyethylene catheters were inserted in the lumen of the ampulla and the uterus of fourteen adult New Zealand rabbits in oestrus. Pressure fluctuations were transmitted and recorded using pressure transducers, a carrier preamplifier and a polygraph. Motility patterns were recorded during oestrus and for the first 5 days post coitum (p.c.). Does were mated to fertile bucks 48 hr after the insertion of catheters.During oestrus, the oviducal contractions were characterized by high frequency, low amplitude, and a slight change in tonus, as indicated by the instability of the resting pressure (Text- fig. 1A); in three rabbits, however, this pattern was not observed and the contractions were irregular and variable (Table 1). Following copulation, a progressive increase in activity was noted and, by 6 hr p.c., the active oviducal motility was characterized by high frequency and amplitude of contractions and regularly repeated outbursts of increased tonus (Text-fig. IB). The activity was reduced at 24 hr p.c. (Text-fig. 1C) and, at 60 hr p.c., an alternating rhythm was associated with rapid and slow sets of contractions (Text- fig. ID). Rapid sets of contractions were abol¬ ished 72 hr p.c. (Text-fig. IE). The relatively infrequent contractions were predominant. A progressive slowing down in frequency and an increase in the

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Electrical Activity of Oviducts in vivo

Cited by 7 publications

References 1 publication

Dynamics of the Ampullary-Isthmic Junction in Rabbit Oviduct

Dynamics of the Ampullary-Isthmic Junction in Rabbit Oviduct

Methods for Studying Oviductal Physiology

Cyclical Changes in Utero-Oviducal Motility in the Rabbit

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