Muscle SpindlesMotor Neurons, GammaEarly Growth Response Protein 3CatsSuccinylcholineGallamine TriethiodideMotor NeuronsMotion Pictures as TopicMusclesNeurons, AfferentNerve EndingsMuscle Fibers, SkeletalMyofibrilsSnakesMuscle ContractionAxonsReflex, StretchNeural ConductionElectric StimulationMuscle, SkeletalHindlimbAction PotentialsMuscle Fibers, Slow-TwitchMyosin Heavy ChainsGlycogenSatellite Cells, Skeletal MuscleNeuromuscular JunctionElectrophysiologyChickensMicroscopy, ElectronImmunohistochemistryTime Factors