J. Anim Sci.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J. Anim Sci. 1972. 34:379-383.
© 1972 American Society of Animal Science
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Schmidt, G. R.
Right arrow Articles by Briskey, E. J.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Schmidt, G. R.
Right arrow Articles by Briskey, E. J.

Electromyography and Resting Membrane Potential in Longissimus Muscle of Stress-Susceptible and Stress-Resistant Pigs

G. R. Schmidt1, G. Goldspink2, T. Roberts, L. L. Kastenschmidt, R. G. Cassens and E. J. Briskey4

University of Wisconsin, Madison,5, 6, 53706

Abstract

Stress-Susceptible (Judge et al., 1968) animals frequently die during transport or handling. In less severe cases these animals suffer substantially when made anoxic; this response is reflected in the production of large quantities (50 to 100 µM/g tissue) of lactic acid in their muscles. A similar response can be noted during the development of anoxia in the muscle after excision or exsanguination (Lister et al., 1970; Sair et al., 1970). The accumulation of high levels of lactate near body temperature results in the development of pale, soft, exudative (PSE) characteristics in the musculature (Judge et al., 1968; Briskey, 1964). Stress-resistant animals show only a slight response to anoxia, have a slow rate of glycolysis and lactic acid accumulation and do not develop PSE characteristics in their musculature.

Bendall (1966) postulated that the rapid rate of glycolysis was due to intense nervous stimuli reaching the muscle. Lippold (1952) and Bigland and Lippold (1954) have indicated that electromyograph (EMG) electrical activity should be a good measure of the amount of muscular activity during and after exsanguination.

Footnotes

1 Present address: Department of Animal Science, University of Illinois, Urbana.

2 Present address: Department of Zoology, University of Hull, Hull, England.

4 Present address: Campbell Institute for Food Research, Camden, New Jersey.

5 Published with the approval of the Director of Research Programs, College of Agricultural and Life Sciences, University of Wisconsin. Muscle Biology Laboratory Manuscript No. 17.

6 Supported in part by Public Health Service Research Grant FD-00107-13 and by special research grants from the American Meat Institute Foundation and the Armour Food Research Laboratories.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1972 by the American Society of Animal Science.