Muscle ContractionMuscle, SkeletalMusclesActinsMuscle Fibers, SkeletalIsometric ContractionAction PotentialsActin CytoskeletonMuscle ProteinsMuscle, SmoothMyosinsTroponin CTropomyosinTroponinCalciumRabbitsMuscle FatigueElectric StimulationMuscle, Smooth, VascularActin Depolymerizing FactorsMuscle DevelopmentCytoskeletonMicrofilament ProteinsMyocardial ContractionRegional Blood FlowMuscle Fibers, Fast-TwitchPhalloidineMuscle RelaxationMyofibrilsMuscle Fibers, Slow-TwitchUterine ContractionGelsolinElectromyographyGuinea PigsActin Capping ProteinsMitochondria, MuscleTime FactorsMuscle, StriatedActomyosinSarcomeresMuscle DenervationPapillary MusclesCells, CulturedModels, BiologicalRats, Sprague-DawleyKineticsMembrane PotentialsRats, WistarAdenosine TriphosphateMyocytes, Smooth MuscleMuscle SpindlesElectrophysiologyTracheaMyocardiumMotor NeuronsHindlimbBiomechanical PhenomenaPotassium ChlorideMyosin Light ChainsMyosin SubfragmentsChickensActininDogsDose-Response Relationship, DrugMuscle CellsMyosin Heavy ChainsPotassiumCytochalasin DPhosphorylationVasoconstrictionTetrodotoxinHeartMolecular Sequence DataProtein BindingMuscular DiseasesSatellite Cells, Skeletal MuscleMuscular AtrophyDestrinThiazolidinesQuadriceps MuscleAcetylcholineContractile ProteinsTropomodulinNeck MusclesNeuromuscular JunctionAmino Acid SequenceMuscle WeaknessSignal TransductionOculomotor MusclesMicroscopy, ElectronActin-Related Protein 2-3 ComplexMicroscopy, FluorescenceIsotonic ContractionSarcoplasmic ReticulumDiaphragmPeristalsisPatch-Clamp TechniquesPsoas MusclesRespiratory MusclesStress, Mechanical