PMID: 6978480Feb 1, 1982Paper

Decrease in stiffness during shortening in calcium activated skinned muscle fibers

Pflügers Archiv : European journal of physiology
T TsuchiyaJ C Rüegg

Abstract

Single fibers from frog sartorius or semitendinosus muscle were mechanically skinned and activated in ATP salt solution containing 10 micro M Ca2+ (7 degrees C). After development of an isometric contraction, fibers were released at constant speed (0.03-2.4 s-1). During ramp shortening, stiffness was determined from the slope of the tension-length diagram obtained during superimposed quick stretches. Both force and stiffness decreased, as the ramp shortening proceeded and approached a steady value after about 60 ms. An increase in speed of shortening caused a decrease in fiber tension and stiffness and an increase in the ratio of stiffness to tension, suggesting a decrease in both the number of attached crossbridges and in the average force per crossbridge.

References

Jan 31, 1978·Pflügers Archiv : European journal of physiology·T Yamamoto, J W Herzig
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Nov 1, 1979·Pflügers Archiv : European journal of physiology·P J GriffithsJ C Rüegg
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Jan 1, 1981·Pflügers Archiv : European journal of physiology·J W HerzigJ C Rüegg

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Citations

Oct 9, 2007·Exercise and Sport Sciences Reviews·Jenna A MonroyKiisa C Nishikawa
Jul 1, 1986·Circulation Research·A Huxley
Dec 1, 1992·Journal of Muscle Research and Cell Motility·K Burton
Jul 18, 2017·Experimental Brain Research·Daniel LudvigEric J Perreault

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