Omaso-abomasal motility and feeding behavior in sheep: A new concept☆
1970; Elsevier BV; Volume: 5; Issue: 1 Linguagem: Inglês
10.1016/0031-9384(70)90014-4
ISSN1873-507X
Autores Tópico(s)Animal Nutrition and Physiology
ResumoOmaso-abomasal motility and mastication movements in 15 ewes have been studied and continuous long-term recordings made. Omaso-abomasal motility was determined by electromyography using supple chronically implanted electrodes. The observed motor phenomena are interpreted in terms of food passage. In the case of the omasum, the results show an association between food-intake and omasal filling and between rumination and omasal emptying. As regards the abomasum, there is an association of rumination and hypermotility which appears as episodes characteristic of gastro-duodenal emptying and a relationship between food-intake and hypermotility which can be identified as gastric hunger contractions. It is believed that the omasum plays a regulating role in the transit of ingesta and in rumination behavior. This conclusion is supported by observations made in the same conditions using subjects having a reticulo-abomasal anastomosis. All results are discussed in relation to classical data and in relation to a possible humoral regulation of rumination behavior.
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