Muscle ContractionMuscle, SkeletalMuscle Fibers, SkeletalIsometric ContractionMusclesTroponin CTroponinMuscle ProteinsMyosinsMuscle FatigueTropomyosinElectric StimulationRabbitsCalciumMuscle, SmoothNeckRegional Blood FlowHead and Neck NeoplasmsMuscle, Smooth, VascularMuscle DevelopmentSciatic NerveMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchMitochondria, MuscleMuscle RelaxationElectromyographyPeripheral NervesNeck PainMyocardial ContractionUterine ContractionMuscle DenervationSatellite Cells, Skeletal MuscleMyofibrilsNerve FibersHindlimbMuscular AtrophyOptic NerveMuscular DiseasesRats, Sprague-DawleyRats, WistarTime FactorsMuscle SpindlesGuinea PigsMotor NeuronsNerve RegenerationMyocytes, Smooth MuscleQuadriceps MuscleMuscle, StriatedSarcomeresMuscle CellsTracheaVasoconstrictionActinsGlycogenTibial NerveDiaphragmPhysical ExertionMuscle WeaknessSarcoplasmic ReticulumNeuromuscular JunctionMyosin Heavy ChainsBiomechanical PhenomenaOculomotor MusclesMyoblastsCells, CulturedNeck MusclesDose-Response Relationship, DrugAdenosine TriphosphateMyocardiumNerve EndingsAcetylcholineMyosin Light ChainsPotassium ChlorideNerve BlockPapillary MusclesKineticsRNA, MessengerPhosphorylationIsotonic ContractionInsulinModels, BiologicalExerciseRespiratory MusclesFemoral NerveSignal TransductionCatsMedian NerveAbdominal MusclesDogsPeristalsisNerve CrushGlucoseSural NerveFacial NerveUlnar NerveCaffeinePsoas MusclesReflexSarcolemmaMyoblasts, Skeletal