منابع مشابه
Length-dependent activation: its effect on the length-tension relation in cat ventricular muscle.
In cat papillary muscles at 30 degrees C, bathed with Tyrode's solution containing 2.25 mM Ca2+, the effect of various inotropic interventions (varying the stimulus frequency and continual paired stimulation) on the shape of the steady state length-tension relation was examined at lengths from Lmax, where tension production is maximal, to 0.87 Lmax. The relative steepness of the length-tension ...
متن کاملEffect of Muscle Length
Cat papillary muscles were tetanized with repetitive electrical stimulation in the presence of 10 ITIM caffeine and 10 mM calcium. Velocities were measured during the plateau of tetanus with quick releases to isotonic loads. The course of isotonic shortening was independent of time in the contraction cycle for at least 2 seconds after the attainment of peak isometric force. The force-velocity r...
متن کاملLength-dependent Ca2+ activation in skeletal muscle fibers from mammalians.
We tested the hypotheses that 1) a decrease in activation of skeletal muscles at short sarcomere lengths (SLs) is caused by an inhibition of Ca(2+) release from the sarcoplasmic reticulum (SR), and 2) the decrease in Ca(2+) would be caused by an inhibition of action potential conduction from the periphery to the core of the fibers. Intact, single fibers dissected from the flexor digitorum brevi...
متن کاملInfluence of muscle length on work from trabecular muscle of frog atrium and ventricle.
The work capacity of segments of atrial and ventricular muscle from the frog Rana pipiens was measured as a function of muscle length using the work loop technique. Both the work done during shortening and the work required to re-lengthen the muscle after shortening increased with muscle length. Net work increased with length up to a maximum, beyond which work declined. The optimum sarcomere le...
متن کاملMinimum Description Length Understanding of Infrared Scenes
Our pattern theoretic approach to automatic target recognition for infrared scenes combines structured and unstruc-tured representations: rigid, 3-D faceted models for known targets of interest and exible, simply connected shapes to accommodate the unknown \clutterers" that the algorithm may encounter. The radiant intensities of both kinds of targets form nuisance variables which are incorporat...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 2007
ISSN: 0022-3751
DOI: 10.1113/jphysiol.2007.137067