Factors Affecting Residual Force Enhancement
نویسندگان
چکیده
منابع مشابه
Residual force enhancement in myofibrils and sarcomeres.
Residual force enhancement has been observed following active stretch of skeletal muscles and single fibres. However, there has been intense debate whether force enhancement is a sarcomeric property, or is associated with sarcomere length instability and the associated development of non-uniformities. Here, we studied force enhancement for the first time in isolated myofibrils (n=18) that, owin...
متن کاملMuscle residual force enhancement: a brief review
Muscle residual force enhancement has been observed in different muscle preparations for more than half a century. Nonetheless, its mechanism remains unclear; to date, there are three generally accepted hypotheses: 1) sarcomere length non-uniformity, 2) engagement of passive elements, and 3) an increased number of cross-bridges. The first hypothesis uses sarcomere non-homogeneity and instabilit...
متن کاملCalcium sensitivity of residual force enhancement in rabbit skinned fibers.
Isometric force after active stretch of muscles is higher than the purely isometric force at the corresponding length. This property is termed residual force enhancement. Active force in skeletal muscle depends on calcium attachment characteristics to the regulatory proteins. Passive force has been shown to influence calcium attachment characteristics, specifically the sarcomere length dependen...
متن کاملModeling residual force enhancement with generic cross-bridge models.
The interaction of actin and myosin through cross-bridges explains much of muscle behavior. However, some properties of muscle, such as residual force enhancement, cannot be explained by current cross-bridge models. There is ongoing debate whether conceptual cross-bridge models, as pioneered by Huxley (A.F. Huxley, Muscle structure and theories of contraction, Prog. Biophys. Biophys. Chem. 7 (1...
متن کاملResidual Force Enhancement in Mechanically Isolated Half-sarcomeres
Our goal was to test if half-sarcomeres produce force enhancement after stretch. Single myofibrils from rabbit psoas were placed in a temperature-controlled (10°C) bath, where half-sarcomeres were isolated using two precalibrated glass micro-needles. The force produced during activation of the half-sarcomere was measured by tracking the displacement of the micro-needles. The half-sarcomere leng...
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ژورنال
عنوان ژورنال: Turkiye Klinikleri Journal of Sports Sciences
سال: 2020
ISSN: 1308-0938,2146-8885
DOI: 10.5336/sportsci.2019-72602