J. Anim Sci.
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J. Anim Sci. 1971. 33:750-758.
© 1971 American Society of Animal Science
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Innervation of Porcine and Bovine Muscle1

H. J. Swatland and R. G. Cassens

University of Wisconsin, Madison 53706

Abstract

The nervous system is essential for the maintenance of muscle (Gutmann, 1962) and for the regulation of its physiological properties (Guth, 1969). The autonomic nervous system by its vasomotor action (Youmans, 1967) and its influence on adipose tissue (Havel, 1965) also exerts an effect on the physiology of muscle. In the following report the morphology of the innervation of porcine and bovine muscle is described.

Immediate postmortem samples were taken from the porcine M. peroneus longus and the bovine M. semimembranosus. Both dark and light parts of the peroneus muscle (figure 1) were sampled and the location of the motor end plates mapped by reacting thin longitudinal strips of muscle for the presence of acetylcholinesterase (Koelle and Friedenwald, 1949). Fasciculi from the peroneus muscle usually had two bands of brown precipitate which were found to be due to the presence of the enzyme at the neuromuscular junction (figure 2). In the semimembranosus muscle the innervation bands were detected using an electrical stimulator (Coërs and Woolf, 1959).

Footnotes

1 This investigation was supported in part by funds from the Research Committee of the Graduate School at the University of Wisconsin and by Public Health Service Research Grant FD-00107. It is published with the approval of the Director of the Wisconsin Agricultural Experiment Station. Muscle Biology Laboratory Contribution No. 1.






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Copyright © 1971 by the American Society of Animal Science.