J. Anim Sci.
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J. Anim Sci. 1982. 54:785-789.
© 1982 American Society of Animal Science
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Effects of Partial Denervation on Ovine Semitendinosus Muscle1

Everett L. Martin3, Robert W. Shanks2 and Raymond W. Wright, Jr.3

Washington State University,3, Pullman 99164

Abstract

The effects of surgically tansectioning the muscular branch of the great sciatic nerve on ovine semitendinosus muscle weight, grams of fat, iodine number and fat percentage were studied. Twelve lambs were randomized into four treatment time periods. Time periods utilized postsurgery were: 48, 75, 110 and 138 d. Overall, highly significant decrease in absolute muscle weight was observed for the denervated muscle compared to the contralateral control. A muscle by section interaction was caused by a difference in relative weight loss between the proximal and distal sections. An increase in absolute muscle weight over time indicated that both the denervated and control muscle continued to grow during the experimental period. No difference in fat content between the denervated and control muscle was observed. An interaction between time and muscle was found due to a reduction in grams of fat in the denervated muscle for the first treatment time period. In denervated and control muscle lipid unsaturation increased with time, and a highly significant decrease in unsaturation was observed for denervated muscle compared to control muscle. Proximal and distal sections of the semitendinosus muscle differed (P<.05) in degree of saturation, the proximal section being more saturated. Also, an interaction between time and section was observed for degree of saturation. This was due to treatment time period two, where the degree of unsaturation was less for the distal section. Fat percentage increased in the distal section of denervated muscle.

Footnotes

1 Scientific paper No. 5253. College of Agriculture Research Center, Washington State Univ., Pullman. Project 0258.

2 Present Address: Athena, OR.

3 Dept. of Anim. Sci.






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Copyright © 1982 by the American Society of Animal Science.