Muscle ContractionMusclesMuscle, SmoothMuscle, SkeletalMuscle ProteinsMuscle, Smooth, VascularMuscle Fibers, SkeletalIsometric ContractionMuscle DevelopmentMuscle FatigueMuscle Fibers, Fast-TwitchMuscle RelaxationMuscle Fibers, Slow-TwitchMuscle DenervationElectric StimulationMyocytes, Smooth MuscleElectromyographyMuscle SpindlesMitochondria, MuscleCalciumMuscle, StriatedNeck MusclesMyocardial ContractionUterine ContractionOculomotor MusclesPapillary MusclesRespiratory MusclesRabbitsMuscle WeaknessAbdominal MusclesQuadriceps MuscleMuscle CellsFacial MusclesMyofibrilsTracheaGuinea PigsMasticatory MusclesHindlimbMasseter MuscleBiomechanical PhenomenaMotor NeuronsTime FactorsIntercostal MusclesVasoconstrictionActinsRats, Sprague-DawleyMuscular AtrophyMuscular DiseasesPsoas MusclesSarcomeresRats, WistarTropomyosinDiaphragmSatellite Cells, Skeletal MusclePotassium ChlorideAcetylcholineNeuromuscular JunctionCells, CulturedPectoralis MusclesPeristalsisDose-Response Relationship, DrugTorqueMyosinsPhysical ExertionMyosin Heavy ChainsTroponin CMyosin Light ChainsCatsCarbacholModels, BiologicalUrinary BladderIsotonic ContractionDogsMyocardiumAdenosine TriphosphateGastrointestinal MotilityGlycogenTemporal MuscleReflexPhosphorylationTroponinrho-Associated KinasesKineticsVasoconstrictor AgentsCaffeineLegAortaSignal TransductionStress, MechanicalIleumMuscle CrampPhenylephrineNorepinephrineTendonsExerciseSarcoplasmic ReticulumMembrane PotentialsPotassiumRNA, MessengerPharyngeal Muscles