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Electrophysiological analysis of responses to intrinsic nerves in circular muscle of opossum esophageal muscle


, : Electrophysiological analysis of responses to intrinsic nerves in circular muscle of opossum esophageal muscle. American Journal of Physiology 254(1 Pt 1): G107-G116

The nerve-mediated responses to electrical field stimulation (EFS) along the opossum esophageal circular smooth muscle were studied with the sucrose-gap recording technique. Strips from 1-2, 4-5, 7-8, and 10-11 cm above the lower esophageal sphincter were stimulated with short-train (300 ms) and long-train (3 s) durations at 29.degree. C. The response always consisted of a hyperpolarization [inhibitory junction potentials (IJP)] followed by an "off depolarization" often associated with spike potentials and mechanical contraction. Proximal to distal differences in the characteristics of the evoked responses were found, i.e., increasing amplitude, duraiton and time to peak hyperpolarization of the IJP, increasing latency, and amplitude of the off depolarization. Neither atropine, scopolamine, physostigmine, nor guanethidine altered these characteristics substantially, Circular strips of muscularis externa, studied in the organ bath at 37.degree. C using 10-s EFS trains at 5-40 pps, produced off contractions, enhanced by physostigmine and reduced by atropine. High-frequency stimulation occasionally initiated small persistent intrastimulus ("on") responses' some were sensitive to cholingergic agents, but there was no gradient in the delay in their onset. Atropine-insensitive and tetrodotoxin-potentiated transient on responses were occasionally detected. We conclude that only the noncholinergic, nonadrenergic innervation provides a functional intrinsic innervation directly to the oppossum esophagus circular smooth muscle when nerves are activated by EFS.

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Accession: 005349401

PMID: 3337229

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Blokpoel H.; Tessier G.D., 1986: The ring billed gull in ontario canada a review of a new problem species. Canadian Wildlife Service Occasional Paper (57): 1-34

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FREEMAN, J.T., 1954: Patterns in aging. Journal of the American Geriatrics Society 2(6): 371-376

Kreutzberg, G.W., 1967: Autoradiographic study on incorporation of leucine-H3 in peripheral nerves during regeneration. Experientia 23(1): 33-34

Zaremba, M.; Sasnauskas, G.; Siksnys, V., 2012: The link between restriction endonuclease fidelity and oligomeric state: a study with Bse634I. Type II restriction endonucleases (REases) exist in multiple oligomeric forms. The tetrameric REases have two DNA binding interfaces and must synapse two recognition sites to achieve cleavage. It was hypothesised that binding of two recognition si...

Wallace, G. B., 1931: A coffee bean disease A parasitic disease of coffee beans. Nematospora coryli is the cause of much of the disease in coffee beans in Tanganyika Territory. This "stigmatomycosis" disease occurs also in Uganda; it will probably be found to have a much wider distribution. The coffee bug, Antestia l...

De Ruggieri P.; Fazio M.; Montoro G.; Sighinolfi O., 1975: Steroidal hetero cyclic 16 15 c pyrazole derivatives of estradiol and estrone. Farmaco Edizione Scientifica 30(7): 547-560

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Engizek, T.; Soyturk, B.; Aksiray, F.; Sunacoglu, H.; Bolukbasi, E., 1987: The effect of mercury on protein and cholesterol synthesis in the mussel (Mytilus galloprovincialis). Istanbul Universitesi Fen Fakultesi Mecmuasi Seri B. 1985 ; 50: 121-124

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