Myogenic transmission of antral slow waves across the gastroduodenal junction in situ

Bortoff, A.; Davis, RS

doi:10.1152/ajplegacy.1968.215.4.889

Cited by 42 publications

(24 citation statements)

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“…The pattern of spontaneous electrical activities of the antrum muscle fibers was similar to those of mammalian stomach muscles recorded by previous investiga tors (Ichikawa and Bozler 1955;Papasova et al 1968;Bortoff and Davis 1968;Fujii 1971), particularly those recorded intracellularly (Kuriyama et al . 1970;Ito and Kuriyama 1975).…”

Section: Discussionsupporting

confidence: 79%

Non-adrenergic Inhibition of the Electrical Activity of the Antrum Muscle Fibers of the Guinea-Pig Stomach

Ohkawa

Watanabe

1976

Tohoku J. Exp. Med.

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Section: Discussionsupporting

confidence: 79%

Non-adrenergic Inhibition of the Electrical Activity of the Antrum Muscle Fibers of the Guinea-Pig Stomach

Ohkawa

Watanabe

1976

Tohoku J. Exp. Med.

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“…Only the occurrence of action potentials in the duodenum was synchronized with the antral slow waves (Allen et al 1964). This phenomenon can be explained by the results of Bortoff & Weg (1965) and Bortoff & Davis (1968) who found that 'antral slow waves spread electrotonically across the gastroduodenal junction and into the proximal duodenum where they periodically augment the depolarizations produced by the duodenal waves themselves' (Bortoff, 1975). Besides this transmission of gastric slow waves contractions of the duodenum may also be stimulated by reflexes or by the evacuated gastric chymus.…”

Section: Discussionmentioning

confidence: 99%

Computer Analysis of Mechanical Activity of Gastroduodenal Junction in Unanaesthetized Dogs

Ehrlein

Hiesinger

1982

Exp Physiol

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SUMMARYIn four conscious dogs mechanical activity of the gastroduodenal junction was recorded with chronically implanted strain gauge transducers and induction coils. The data were evaluated by a computer. Analog circuits were used in order to reduce the data which were transferred to the computer. In the digestive state the contractions of the pyloric sphincter and duodenal bulb were correlated in such a way that the contractions of the duodenal bulb were inhibited when the gastric waves travelled across the antrum and that the bulb contracted once or twice when the peristaltic waves arrived at the gastroduodenal junction. However, the timing between pyloric and duodenal contractions was imperfect. Contraction maxima of the duodenal bulb often occurred before the pylorus was closed. This was due to the different inherent frequencies of the pyloric and duodenal contractions. In the interdigestive state the timing between the pyloric and duodenal contractions was as imperfect as during the digestive state. In phase III of the interdigestive activity, however, the strong antral contractions were regularly associated with inhibition of the duodenal bulb. This phenomenon can be interpreted as co-ordination between gastric and duodenal activity.

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“…This is suggested by the lack of innervation of some portions of the digestive tract, including, strikingly, the main digestive and absorptive portion of the midgut (37). Myogenic transmission of electrical activity in the absence of innervation has been demonstrated across the gastroduodenal junction of cats, dogs, and primates (14). The few studies of peristaltic regulation in Drosophila have concerned the effects of neuropeptides, such as dromyosuppressin, allatostatin-C, and drosulfakinin, on ex vivo intestinal preparations (92,138,142).…”

Section: Intestinal and Nonintestinal Roles Of Enteric Neuronsmentioning

confidence: 99%

The Digestive Tract of Drosophila melanogaster

2013

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The digestive tract plays a central role in the digestion and absorption of nutrients. Far from being a passive tube, it provides the first line of defense against pathogens and maintains energy homeostasis by exchanging neuronal and endocrine signals with other organs. Historically neglected, the gut of the fruit fly Drosophila melanogaster has recently come to the forefront of Drosophila research. Areas as diverse as stem cell biology, neurobiology, metabolism, and immunity are benefitting from the ability to study the genetics of development, growth regulation, and physiology in the same organ. In this review, we summarize our knowledge of the Drosophila digestive tract, with an emphasis on the adult midgut and its functional underpinnings. 377

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Myogenic transmission of antral slow waves across the gastroduodenal junction in situ

Cited by 42 publications

References 0 publications

Non-adrenergic Inhibition of the Electrical Activity of the Antrum Muscle Fibers of the Guinea-Pig Stomach

Non-adrenergic Inhibition of the Electrical Activity of the Antrum Muscle Fibers of the Guinea-Pig Stomach

Computer Analysis of Mechanical Activity of Gastroduodenal Junction in Unanaesthetized Dogs

The Digestive Tract of Drosophila melanogaster

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