Muscle ContractionMuscle, SkeletalMusclesMuscle Fibers, SkeletalActinsIsometric ContractionMuscle ProteinsMuscle, SmoothActin CytoskeletonMyosinsMuscle FatigueTropomyosinTroponin CTroponinRabbitsMuscle, Smooth, VascularCalciumElectric StimulationMuscle DevelopmentActin Depolymerizing FactorsMuscle Fibers, Fast-TwitchCytoskeletonMuscle Fibers, Slow-TwitchMicrofilament ProteinsMuscle RelaxationMitochondria, MuscleRegional Blood FlowMyofibrilsMuscle, StriatedMuscle DenervationElectromyographyMyocardial ContractionPhalloidineMyocytes, Smooth MuscleUterine ContractionGelsolinSarcomeresMuscle SpindlesActin Capping ProteinsTime FactorsMuscular DiseasesActomyosinCells, CulturedHindlimbSatellite Cells, Skeletal MuscleModels, BiologicalMuscle CellsNeck MusclesTracheaMyosin Heavy ChainsMuscular AtrophyPapillary MusclesQuadriceps MuscleOculomotor MusclesBiomechanical PhenomenaKineticsAdenosine TriphosphateMuscle WeaknessGuinea PigsRats, Sprague-DawleyChickensRespiratory MusclesRats, WistarMolecular Sequence DataMyosin Light ChainsActininPhosphorylationAbdominal MusclesMyocardiumMyosin SubfragmentsPotassium ChlorideVasoconstrictionMyoblastsPsoas MusclesProtein BindingMotor NeuronsAmino Acid SequenceDiaphragmCytochalasin DDose-Response Relationship, DrugFacial MusclesSignal TransductionMicroscopy, ElectronGlycogenRNA, MessengerContractile ProteinsMasticatory MusclesStress, MechanicalAcetylcholineDogsDestrinMicroscopy, FluorescenceTropomodulinNeuromuscular JunctionPhysical ExertionThiazolidinesMasseter MuscleActin-Related Protein 2-3 ComplexCytoskeletal ProteinsIsotonic Contraction