Sarcomere length dispersion in single skeletal muscle fibers and fiber bundles
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چکیده
منابع مشابه
Dependence of shortening heat on sarcomere length in frog muscle and fiber bundles.
The relation between shortening heat and sarcomere length was studied using fiber bundles from frog semitendinosus muscles as well as using whole muscles. The initial sarcomere length was varied between 2.0 and 3.66 micron. Shortening heat was estimated as the excess heat produced after a rapid isovelocity release in a 3 sec tetanus at 0 degrees C. The isometric control heat was measured in the...
متن کاملSarcomere strain and heterogeneity correlate with injury to frog skeletal muscle fiber bundles.
Sarcomere length and first-order diffraction line width were measured by laser diffraction during elongation of activated frog tibialis anterior muscle fiber bundles (i.e., eccentric contraction) at nominal fiber strains of 10, 25, or 35% (n = 18) for 10 successive contractions. Tetanic tension, measured just before each eccentric contraction, differed significantly among strain groups and chan...
متن کاملThe Sarcomere Length-Tension Relation in Skeletal Muscle
I N T R O D U C T I O N T e n s i o n d e v e l o p m e n t d u r i n g an i s o m e t r i c t e t a n u s in ske le ta l musc le occu r s in t h r e e d i s t inc t phases : t en s ion ini t ia l ly r ises r a p i d l y , t h e n c l imbs m o r e s lowly, a n d f ina l ly r e a c h e s a p l a t e a u which lasts m a n y s e c o n d s . T h i s t i m e c o u r s e is o b s e r v e d d u r i n ...
متن کاملThe sarcomere length-tension relation in skeletal muscle
Tension development during isometric tetani in single fibers of frog semitendinosus muscle occurs in three phases: (a) in initial fast-rise phase; (b) a slow-rise phase; and (c) a plateau, which lasts greater than 10 s. The slow-rise phase has previously been assumed to rise out of a progressive increase of sarcomere length dispersion along the fiber (Gordon et al. 1966. J. Physiol. [Lond.]. 18...
متن کاملIntraoperative single-site sarcomere length measurement accurately reflects whole-muscle sarcomere length in the rabbit.
PURPOSE To compare single-site intraoperative sarcomere length values with sarcomere lengths measured from systematic sampling of the entire transferred muscle. METHODS The tendon of the rabbit second toe extensor muscle was transposed to the ankle extensor retinaculum under levels of stretch over the sarcomere length range of about 2.5 microm to about 4.0 microm. Intraoperative sarcomere len...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 1976
ISSN: 0006-3495
DOI: 10.1016/s0006-3495(76)85742-6