...William Gittings; Jordan Bunda; Rene Vandenboom ABSTRACT Skeletal myosin light chain kinase (skMLCK)-catalyzed phosphorylation of the myosin regulatory light chain (RLC) increases (i.e. potentiates) mechanical work output of fast skeletal muscle. The influence of this event on contractile economy...

... mouse lumbrical muscle at physiological temperatures. Potentiation Inorganic phosphate Contractile kinetics Skeletal muscle The rate of force decline during muscle relaxation can become faster when a muscle is activated repeatedly. This effect is readily seen during repeated twitch...

...Louis F. Gainey, Jr; Michael J. Greenberg SUMMARY The physiology and timing of gill muscle potentiation were explored in the clam Mercenaria mercenaria . When isolated demibranchs were exposed twice (with an intervening wash) to the same concentration of 5-hydroxytryptamine, the second contraction...

..., keeping the length constant after the initial quick length changes (isometric experiments). For the dynamic experiments, enhancement of the performance of the contractile machinery (potentiation) was calculated as the ratio of the average force level over each millimetre of shortening during PS...

... is characterized by production of large excitatory postsynaptic potentials (EPSPs) in the target muscle fibres. The EPSPs show rapid diminution in amplitude (synaptic depression) when neuronal activity is sustained. Correspondingly, muscle action potentials and accompanying contractions soon cease with maintained...