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J R Soc Med 1989;82:88-90
© 1989 Royal Society of Medicine

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Journal of the Royal Society of Medicine, Vol 82, Issue 2 88-90, Copyright © 1989 by Royal Society of Medicine

ORIGINAL ARTICLES

Human rectosigmoid electromyography: a new approach and some pitfalls

EA Wegman, AM Aniss, TD Bolin, AE Davis and SC Gandevia
Prince Henry and Prince of Wales Hospitals and School of Medicine, University of New South Wales, Sydney, Australia.

A method has been developed to record directly myoelectrical activity from the smooth muscle of the colon of intact subjects using pairs of intramuscular wires. Discrete bursts of myoelectrical activity occurred at 4-20 per min. A small interelectrode distance in this method allows contamination of colonic myoelectrical activity by the electromyogram of skeletal muscle to be excluded. This artefact has not been considered in previous recordings of 'colonic' activity.
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