Changes of the force-velocity relation, isometric tension and relaxation rate during fatigue in intact, single fibres of Xenopus skeletal muscle

1994 ◽  
Vol 15 (3) ◽  
Author(s):  
H�kan Westerblad ◽  
Jan L�nnergren
Keyword(s):  
Skeletal Muscle ◽  
Relaxation Rate ◽  
Isometric Tension ◽  
Velocity Relation ◽  
Force Velocity ◽  
Single Fibres

scholarly journals Validity of the Force-Velocity Relation for Muscle Contraction in the Length Region, l ≤ l0

1967 ◽  
Vol 50 (5) ◽  
pp. 1125-1137 ◽  
Author(s):  
Yorimi Matsumoto
Keyword(s):  
Length Change ◽  
Hill Equation ◽  
Isometric Tension ◽  
Resting Tension ◽  
Reference Length ◽  
Velocity Relation ◽  
Force Velocity ◽  
Almost All ◽  
The Hill ◽  
Isotonic Shortening

Considerable attention has been directed to the characteristic force-velocity relation discovered by A. V. Hill in the study of muscle kinematics. Models of contractile process were tested on the basis of their compatibility with the Hill equation. However, almost all the isotonic data have been restricted to one length, l0, the maximum length with almost no resting tension; the velocities measured are those initial values when the load begins to move. The force-velocity curve extrapolates to zero velocity for isometric tension, but only for the tension at that one length. Very few efforts have been made to study the profiles of the curves throughout the range of lengths over which shortening takes place. In examining the length region, l ≤ l0, for an isotonically contracting muscle, not only is the force-velocity relation valid for the initial reference length, l0, but also for any other length. The analysis in this report indicates that the constants a/P0 and b/l0 remain fixed throughout the length change of afterloaded isotonic shortening in the Rana pipiens sartorius muscles.

Partially Activated Human Skeletal Muscle: An Experimental Investigation of Force, Velocity, and EMG

1976 ◽  
Vol 43 (1) ◽  
pp. 81-86 ◽  
Author(s):  
G. I. Zahalak ◽  
J. Duffy ◽  
P. A. Stewart ◽  
H. M. Litchman ◽  
R. H. Hawley ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Human Skeletal Muscle ◽  
Steady Motion ◽  
Surface Emg ◽  
Test Results ◽  
Antagonist Activity ◽  
Velocity Relation ◽  
Force Velocity ◽  
Simple Equations

Experiments are described which establish quantitative relations between muscular force, contraction velocity, and the electrical activity of the muscle (as measured by the surface EMG) under conditions of steady motion. The six subjects who participated in these experiments were all athletes. Test results confirm that human skeletal muscle in vivo behaves differently when it is contracting under load than when it is extending under load. At maximum voluntary effort the force-velocity relation is similar to that found for excised, tetanized muscle (Hill’s equation). Antagonist activity was found to be low under all conditions of load and velocity. Simple equations are proposed to describe the observed force-velocity-activation relations. The parameters of these equations, which represent the apparent internal friction properties of the muscles, are evaluated and reported.

Modeling force–velocity relation in skeletal muscle isotonic contraction using an artificial neural network

Biosystems ◽  
2007 ◽  
Vol 90 (2) ◽  
pp. 529-534 ◽  
Author(s):  
Sharareh Dariani ◽  
Mansoor Keshavarz ◽  
Mohsen Parviz ◽  
Mohammad Reza Raoufy ◽  
Shahriar Gharibzadeh
Keyword(s):  
Neural Network ◽  
Skeletal Muscle ◽  
Artificial Neural Network ◽  
Isotonic Contraction ◽  
Velocity Relation ◽  
Force Velocity ◽  
Artificial Neural

scholarly journals Force-Velocity Relation of Sliding of Skeletal Muscle Myosin, Arranged on a Paramyosin Filament, on Actin Cables.

1998 ◽  
Vol 48 (2) ◽  
pp. 115-121 ◽  
Author(s):  
Tsukasa TAMEYASU ◽  
Tsuyoshi AKIMOTO ◽  
Yasuhisa HIROHATA ◽  
Ibuki SHIRAKAWA ◽  
Naoto YAMAMOTO ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Skeletal Muscle Myosin ◽  
Velocity Relation ◽  
Force Velocity ◽  
Actin Cables ◽  
Muscle Myosin
Sign in / Sign up

Export Citation Format

Share Document