Muscle Stiffness Changes during Isometric Contraction in Frog Skeletal Muscle as Studied by the Use of Ultrasonic Waves

1984 ◽  
pp. 673-686 ◽  
Author(s):  
I. Hatta ◽  
Y. Tamura ◽  
T. Matsuda ◽  
H. Sugi ◽  
T. Tsuchiya
Keyword(s):  
Skeletal Muscle ◽  
Isometric Contraction ◽  
Ultrasonic Waves ◽  
Muscle Stiffness ◽  
Frog Skeletal Muscle

scholarly journals Intensity changes of the first and second thin-filament layer-lines of a frog skeletal muscle during isometric contraction

2000 ◽  
Vol 40 (supplement) ◽  
pp. S64
Author(s):  
Y. Takezawa ◽  
T. Kobayashi ◽  
Y. Sugimoto ◽  
K. Wakabayashi
Keyword(s):  
Skeletal Muscle ◽  
Isometric Contraction ◽  
Thin Filament ◽  
Frog Skeletal Muscle ◽  
Intensity Changes

Ultra-Rapid Freezing of Isolated Skeletal Muscle Fibers

1977 ◽  
Vol 35 ◽  
pp. 576-577
Author(s):  
Joachim R. Sommer ◽  
Nancy R. Wallace
Keyword(s):  
Skeletal Muscle ◽  
Sarcoplasmic Reticulum ◽  
Granular Material ◽  
Nuclear Envelope ◽  
Intracellular Calcium ◽  
Ruthenium Red ◽  
Threshold Concentration ◽  
Rapid Freezing ◽  
Frog Skeletal Muscle ◽  
Electrical Isolation

After Howell (1) had shown that ruthenium red treatment of fixed frog skeletal muscle caused collapse of the intermediate cisternae of the sarcoplasmic reticulum (SR), forming a pentalaminate structure by obi iterating the SR lumen, we demonstrated that the phenomenon involves the entire SR including the nuclear envelope and that it also occurs after treatment with other cations, including calcium (2,3,4).From these observations we have formulated a hypothesis which states that intracellular calcium taken up by the SR at the end of contraction causes the M rete to collapse at a certain threshold concentration as the first step in a subsequent centrifugal zippering of the free SR toward the junctional SR (JSR). This would cause a) bulk transport of SR contents, such as calcium and granular material (4) into the JSR and, b) electrical isolation of the free SR from the JSR.

Electron Probe Analysis of Muscle

1982 ◽  
Vol 40 ◽  
pp. 398-401
Author(s):  
A. V. Somlyo ◽  
H. Shuman ◽  
A. P. Somlyo
Keyword(s):  
Skeletal Muscle ◽  
Smooth Muscle ◽  
Sarcoplasmic Reticulum ◽  
Resting State ◽  
Binding Sites ◽  
Electron Probe ◽  
Frog Skeletal Muscle ◽  
Electron Probe Analysis ◽  
Probe Analysis

Electron probe analysis of frozen dried cryosections of frog skeletal muscle, rabbit vascular smooth muscle and of isolated, hyperpermeab1 e rabbit cardiac myocytes has been used to determine the composition of the cytoplasm and organelles in the resting state as well as during contraction. The concentration of elements within the organelles reflects the permeabilities of the organelle membranes to the cytoplasmic ions as well as binding sites. The measurements of [Ca] in the sarcoplasmic reticulum (SR) and mitochondria at rest and during contraction, have direct bearing on their role as release and/or storage sites for Ca in situ.

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