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  • Title: [Effect of stretching of the cat gastrocnemius muscle on its tetany, postcontraction hyperemia and energy metabolism indices].
    Author: Matchanov AT, Shustova NIa, Shuvaeva VN, Vasil'eva LI, Levtov VA.
    Journal: Fiziol Zh SSSR Im I M Sechenova; 1983 Feb; 69(2):210-9. PubMed ID: 6840344.
    Abstract:
    Longitudinal stretch of the muscle in the range E = 0.11-0.17 (111-117% of the initial length) is followed by increase in passive strength and in mechanical displays of the 15-sec isometric Blood flow in the muscle vessels decreases at rest in the longitudinal stretching whereas O2 extraction from the blood increases; O2 consumption and ration of arterio-venous differences in the lactate and pyruvate concentration do not change. Additional posttetanic blood supply in the muscle, posttetanic alteration of the O2 consumption in it and the lactate/pyruvate ratio in longitudinal stretch do not differ from the analogous parameters in the initial--length muscle. The data obtained are in accordance with the metabolic theory of the hyperemia mechanisms but can hardly be explained from the standpoint of the histomechanical theory.
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