ColubridaeMuscle ContractionMusclesMuscle, SmoothMuscle ProteinsMuscle, SkeletalMuscle, Smooth, VascularMuscle Fibers, SkeletalMuscle DevelopmentMuscle FatigueMuscle DenervationMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchMyocytes, Smooth MuscleMitochondria, MuscleNeck MusclesOculomotor MusclesMuscle SpindlesMuscle RelaxationMuscle, StriatedRespiratory MusclesPapillary MusclesMuscle WeaknessElectromyographyAbdominal MusclesQuadriceps MuscleMuscle CellsMasseter MuscleMasticatory MusclesIntercostal MusclesFacial MusclesIsometric ContractionElectric StimulationMuscular AtrophySatellite Cells, Skeletal MuscleTonic PupilPectoralis MusclesMotor NeuronsMuscular DiseasesCalciumHindlimbRabbitsRats, Sprague-DawleyPsoas MusclesTime FactorsMyofibrilsCells, CulturedTemporal MuscleAction PotentialsMyosin Heavy ChainsPharyngeal MusclesDiaphragmRats, WistarMembrane PotentialsBiomechanical Phenomena