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Response of Striated Muscle to Electrical Stimulation
Author(s) -
FORREST J. C.,
BRISKEY E. J.
Publication year - 1967
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1967.tb00816.x
Subject(s) - stimulation , glycolysis , electrical muscle stimulation , biology , lactic acid , leg muscle , medicine , anatomy , endocrinology , metabolism , physical medicine and rehabilitation , bacteria , genetics
SUMMARY— The response of striated muscle to electrical stimulation was studied in 30 Duroc pigs at two weights; and in 14 Poland China, 11 Yorkshire and 8 Yorkshire‐Duroc crossbred pigs of market weight. The Duroc pigs in the heavyweight group were more responsive to electrical stimulation, had a slower rate of post‐mortem pH decline and higher color‐morphology ratings than the light weight group of Durocs. The sex of the animal had only a slight effect on the response of the muscle to electrical stimulation. Muscles with a slow rate of glycolysis were significantly more responsive to electrical stimulation than those with an intermediate rate of glycolysis. The initial lactic acid concentration, unless present in excessive quantities, appeared to have little influence on the responsiveness of the muscle to electrical stimulation. Lactic acid increased significantly, accompanied by a lowering of pH, during the electrical stimulation of the muscle. Stimulation of the spinal cord caused a significantly lower color‐morphology rating and pH in the Poland China and Yorkshire, but not in the Duroc animals. Electrical stimulation in animals other than Poland China did not produce pale, soft, exudative (PSE) musculature. The electrical stimulatory response of red and white muscle was not significantly (P > .05) different; however, the data indicate that white muscle and PSE muscle do not respond in a similar manner to electrical stimulation.