[Skeletal muscle reaction to the loading limit. III. Changes in the contractile apparatus].
A description is given of the changes in the contractile apparatus of the skeletal muscle following extreme long-term exercise. In detail, they include Z-stripe dehiscences, myofibril disintegrations and destructions of single sarcomer . These findings are known from myopathology . A characteristic feature is their subsarcolemmic localisation. The pathogenesis is discussed. In connection with the alterations of the sarcolemma and the mitochondria as well as the increased endo- and exocytosis of the muscle fibre, the cause is seen in a local intracellular catabolism. At the same time, the possible importance to the effluence of enzymes, especially of creatine phosphokinase, is pointed out.
D000328:Adult; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D009119:Muscle Contraction; D009132:Muscles / Q000502:physiology / Q000648:ultrastructure*; D005082:Physical Exertion; D012518:Sarcomeres / Q000648:ultrastructure
Die Reaktion der Skelettmuskulatur auf Grenzbelastungen. III. Veränderungen des kontraktilen Apparates.