Effect of nervous excitation on acid secretion in horses

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Nervous excitation was induced by various means in horses provided with a gastric cannula. Insulin hypoglycaemia profoundly inhibited the basal acid output and volume secreted from the stomach. No clear effect on acid secretion was noted after administration of bethanechol, as the acid output was covered by the copious secretion of saliva. Atropine almost abolished the basal acid output. Sensoric stimulation by teasing caused a slight but not significant increase in the total acid output. These data suggest that cholinergic excitation might play a role in the stimulation of both volume and acid secretion in the horse. The inhibitory effect seen on these two parameters after insulin hypoglycaemia may hypothetically be ascribed to inhibitory impulses carried in peptide neurones of the vagal nerves or to inhibitory impulses in adrenergic nerves acting directly or indirectly on the parietal cells.

Keywords: atropine; bethanechol; equine; insulin; teasing

Document Type: Research Article

DOI: http://dx.doi.org/10.1046/j.1365-201x.2000.00682.x

Affiliations: 1: Department of Animal Physiology, Swedish University of Agricultural Sciences, Uppsala, Sweden 2: Department of Large Animal Clinical Sciences, University of Tennessee, Knoxville, TN, USA

Publication date: March 1, 2000

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