Patterns of gastric electrical and motor activity in miniature pigs

1976 ◽  
Vol 54 (5) ◽  
pp. 764-773 ◽  
Author(s):  
Claude Rozé ◽  
Daniel Couturier ◽  
Charles Debray
Keyword(s):  
Mechanical Activity ◽  
Gastric Myoelectrical Activity ◽  
Spike Response ◽  
Control Activity ◽  
Myoelectrical Activity ◽  
Standard Meal ◽  
Implanted Electrodes ◽  
Miniature Pigs ◽  
Pacesetter Potentials ◽  
Cyclic Control

Gastric myoelectrical and mechanical activity was recorded in miniature pigs using chronically implanted electrodes and strain gauge force transducers. Semiautomated methods were devised to obtain quantitative evaluations of the electrical and mechanical parameters measured in fasted and fed animals. The patterns of gastric myoelectrical activity in pigs were, on the whole, similar to the patterns described in dogs, including regular cyclic control activity and spike response activity associated with muscle contraction. However, several points were peculiar to the species studied: conduction velocity of pacesetter potentials increased only moderately in the antrum; tachygastria never occurred in the experiments; in response to a standard meal, the frequency of pacesetter potentials gradually increased; mechanical activity proceeded at its maximal force immediately after feeding and for a long period; no evidence of 'migrating electrical complexes' was found in the stomach during fasting. The 40-min period following administration of a test meal appeared especially suitable for pharmacological or physiological experiments in which inhibitory factors are to be tested on the stomach.

Effects of meal volume and composition on gastric myoelectrical activity

1998 ◽  
Vol 274 (2) ◽  
pp. G430-G434 ◽  
Author(s):  
Daniela Levanon ◽  
Ming Zhang ◽  
William C. Orr ◽  
J. D. Z. Chen
Keyword(s):  
Dominant Frequency ◽  
Gastric Myoelectrical Activity ◽  
Myoelectrical Activity ◽  
Standard Meal ◽  
High Fiber ◽  
Gastric Slow Waves ◽  
Food Properties ◽  
Postprandial Motility ◽  
Significant Difference ◽  
Effect Of Food

The absence of a standard meal in electrogastrography may limit its clinical significance. Different meals may fail to produce the expected postprandial motility pattern. The aim of this study was to investigate the effect of meal volume and composition on postprandial myoelectrical activity. Fourteen healthy subjects were given four meals that differed from a “reference meal” in one single parameter (volume, calorie, or fiber content). Gastric myoelectrical activity was measured using surface electrogastrography. Spectral and statistical analyses were performed to investigate the effect of food properties on electrogastrogram (EGG) parameters. It was found that the reference meal produced a postprandial increase in the dominant frequency ( P < 0.007), dominant power ( P < 0.04), and percentage of normal 2–4 cycle/min gastric slow waves ( P > 0.05). Similar changes were observed with the low-volume and high-fiber meals but not with the reduced-calorie meal. Fasting EGG parameters in all four sessions showed no significant difference. It was concluded that low-calorie meals do not result in expected postprandial physiological responses and thus are not appropriate for EGG tests. A volume reduction of down to one-half the volume of a regular meal does not affect postprandial changes of the EGG; thus a condensed test meal may be recommended for symptomatic patients.

Myoelectrical activity of gastric antrum in conscious piglets around weaning

2000 ◽  
Vol 80 (4) ◽  
pp. 577-584 ◽  
Author(s):  
Violetta Lesniewska ◽  
Helle N. Lærke ◽  
Mette S. Hedemann ◽  
Bent B. Jensen ◽  
Søren Højsgaard ◽  
...  
Keyword(s):  
Electrical Response ◽  
Cyclic Activity ◽  
Gastric Myoelectrical Activity ◽  
Control Activity ◽  
Myoelectrical Activity ◽  
Bipolar Electrodes ◽  
Food Standard ◽  
Before And After ◽  
Dry Food ◽  
Conscious Animals

We investigated gastric myoelectrical activity in piglets around weaning. The study was carried out on the same piglets before and after weaning. Before weaning, the piglets were kept with their littermates and nursed by the sow, then they were weaned on solid dry food (standard concentrate for weaning pigs) and fed three times a day. Gastric myoelectrical activity was recorded in conscious animals using bipolar electrodes implanted on the wall of the terminal antrum. A cyclic activity pattern of the antral region in the stomach was present in both suckling and weaned piglets and consisted of quiescence and an activity phase. Sow's milk under nursing conditions significantly decreased the frequency of response potentials in ERA (electrical response activity). However, milk did not influence the basic electrical rhythm (BER) i.e., frequency of ECA (electrical control activity) and did not affect the periodicity of the cyclical activity. After weaning, ingestion of solid feed increased the BER, the frequency of ERA and the frequency of response potentials of ERA and slightly affected the periodicity of the cyclical activity. Key words: Gastric terminal antrum, piglet, weaning, electromyography

Serosal and cutaneous recordings of gastric myoelectrical activity in patients with gastroparesis

1994 ◽  
Vol 266 (1) ◽  
pp. G90-G98 ◽  
Author(s):  
J. D. Chen ◽  
B. D. Schirmer ◽  
R. W. McCallum
Keyword(s):  
Electrical Stimulation ◽  
Slow Wave ◽  
Test Meal ◽  
Frequency Change ◽  
Fasting State ◽  
Gastric Myoelectrical Activity ◽  
Myoelectrical Activity ◽  
Gastric Slow Wave ◽  
Student’S T ◽  
Student’S T Test

The aims of this study were to 1) investigate gastric myoelectrical activity in patients with gastroparesis, 2) validate the cutaneous electrogastrogram (EGG) in tracking the frequency change of the gastric slow wave, and 3) investigate the effect of electrical stimulation on gastric myoelectrical activity. Gastric myoelectrical activity was recorded in 12 patients with documented gastroparesis using serosal electrodes for > 200 min in each subject. All recordings were made at least 4 days after surgery. Each session consisted of a 30-min recording in the fasting state and a 30-min recording after a test meal. The test meal (liquid or mixed) was selected according to patient's tolerance. Electrical stimulation was performed in three subjects via the serosal electrodes at a frequency of 3 cycles/min. Gastric myoelectrical activity was recorded using serosal electrodes in each session. The serosal recording showed slow waves of 2.5 to 4.0 cycles/min in all 12 subjects. Absence of spikes was noted in 11 of the 12 subjects. The simultaneous serosal and cutaneous recording of gastric myoelectrical activity showed that the frequency of the EGG was exactly the same as that of the serosal recording. Liquid meals resulted in a significant decrease in slow-wave frequency (Student's t test, P = 0.006), and the EGG accurately reflected this change. Electrical stimulation had no effect on the frequency of the gastric slow wave and did not induce spikes.(ABSTRACT TRUNCATED AT 250 WORDS)

Effect of metoclopramide on gastric myoelectrical activity in patients with gastroparesis

1998 ◽  
Vol 114 ◽  
pp. A792
Author(s):  
Z.Y. Lin ◽  
R.W. McCallum ◽  
B.D. Schirmer ◽  
J.D.Z. Chen
Keyword(s):  
Gastric Myoelectrical Activity ◽  
Myoelectrical Activity

Gastric myoelectrical activity in patients with type I diabetes mellitus and autonomic neuropathy

1994 ◽  
Vol 39 (11) ◽  
pp. 2376-2383 ◽  
Author(s):  
H. J. A. Jebbink ◽  
P. P. M. Bruijs ◽  
B. Bravenboer ◽  
L. M. A. Akkermans ◽  
G. P. van Berge-Henegouwen ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Autonomic Neuropathy ◽  
Type I Diabetes ◽  
Type I Diabetes Mellitus ◽  
Type I ◽  
Gastric Myoelectrical Activity ◽  
Myoelectrical Activity
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