Measurement of electrical activity of the human small intestine using surface electrodes

The electrical slow-wave activity of the human small intestine has been simulated by a chain of 64 coupled electronic relaxation oscillators. The model simulates the frequency gradient of recorded patoentials in the human small intestine and when transected, behaves in a similar way to the transected canine small intestine. The model exhibits a spontaneous effect whereby several adjacent oscillators periodically are in the same state. This effect travels down the model in the time of 20-30 min.

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13-NLE-motilin and interdigestive motor and electrical activity of human small intestine

Gastroenterology ◽

10.1016/0016-5085(78)93223-7 ◽

1978 ◽

Vol 74 (5) ◽

pp. 1058 ◽

Cited By ~ 1

Author(s):

G. Lux ◽

U. Strunz ◽

S. Domschke ◽

J. Femppel ◽

W. Rösch ◽

...

Keyword(s):

Small Intestine ◽

Electrical Activity ◽

Human Small Intestine

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A mathematical model of the slow-wave electrical activity of the human small intestine

Medical & Biological Engineering ◽

10.1007/bf02477440 ◽

1974 ◽

Vol 12 (6) ◽

pp. 750-758 ◽

Cited By ~ 44

Author(s):

B. Robertson-Dunn ◽

D. A. Linkens

Keyword(s):

Mathematical Model ◽

Small Intestine ◽

Electrical Activity ◽

Slow Wave ◽

Human Small Intestine

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Minute rhythm of electrical spike bursts of the small intestine in different species

AJP Gastrointestinal and Liver Physiology ◽

10.1152/ajpgi.1982.242.6.g654 ◽

1982 ◽

Vol 242 (6) ◽

pp. G654-G659 ◽

Cited By ~ 3

Author(s):

P. Fleckenstein ◽

L. Bueno ◽

J. Fioramonti ◽

Y. Ruckebusch

Keyword(s):

Small Intestine ◽

Electrical Activity ◽

Short Distance ◽

Phase Iii ◽

Pressure Waves ◽

Implanted Electrodes ◽

Fluid Content ◽

Human Small Intestine ◽

Period Duration ◽

Spike Bursts

Electrical activity of propagating spike bursts recurring at minute intervals was recorded from the small intestine by chronically implanted electrodes in the rabbit, cat, dog, sheep, and pig. This "minute rhythm" has been recorded previously from the intact human small intestine. It occurs in the jejunum with a period duration of 0.5-2.0 min in all species examined. The minute rhythm was accompanied by pressure waves propagating over a short distance, and the activity was most prominent before the onset of phase III of the myoelectric complex. The minute rhythm was activated by the infusion of saline in the jejunum, and it may possibly reflect a normal mechanism for the transport of fluid content.

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Electron probe x-ray microanalysis and electron microscopy of amino acid absorption and transport by the small intestine: inhibition by chemical poisons and correlation to the elemental composition of the epithelial cells

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100142311 ◽

1986 ◽

Vol 44 ◽

pp. 134-135

Author(s):

A. J. Tousimis

Keyword(s):

Small Intestine ◽

Amino Acid ◽

Epithelial Cells ◽

Elemental Composition ◽

Isotope Labeling ◽

Structural Components ◽

X Ray ◽

Human Small Intestine ◽

Transport Studies

The elemental composition of amino acids is similar to that of the major structural components of the epithelial cells of the small intestine and other tissues. Therefore, their subcellular localization and concentration measurements are not possible by x-ray microanalysis. Radioactive isotope labeling: I131-tyrosine, Se75-methionine and S35-methionine have been successfully employed in numerous absorption and transport studies. The latter two have been utilized both in vitro and vivo, with similar results in the hamster and human small intestine. Non-radioactive Selenomethionine, since its absorption/transport behavior is assumed to be the same as that of Se75- methionine and S75-methionine could serve as a compound tracer for this amino acid.

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