Neuromuscular DiseasesNeural ConductionHeart Conduction SystemRespiratory InsufficiencyMuscular DystrophiesMyotonic DystrophyHypoventilationMuscular Dystrophy, DuchenneRespiratory MusclesTracheostomyNADH Tetrazolium ReductaseMuscular Atrophy, SpinalNeuromuscular Junction DiseasesMuscular Dystrophy, FacioscapulohumeralTracheotomyRespiratory TherapyRespiration, ArtificialArthrogryposisInsufflationIntermittent Positive-Pressure VentilationAtrioventricular NodeHereditary Sensory and Motor NeuropathyMuscle, SkeletalMuscular DiseasesMasksMyasthenia GravisSpinal Muscular Atrophies of ChildhoodPositive-Pressure RespirationMyographyOphthalmoplegiaMuscle WeaknessVentilators, MechanicalGuillain-Barre SyndromeAmyotrophic Lateral SclerosisRespiration DisordersSMN Complex ProteinsCharcot-Marie-Tooth DiseaseHeart BlockSurvival of Motor Neuron 1 ProteinMusclesElectric ImpedanceMotor NeuronsElectromyographyMuscle Fibers, SkeletalMyositisCoughMuscular AtrophyVentilator WeaningDystrophinSleep Apnea SyndromesScoliosisMice, Inbred mdxMucusAction PotentialsRespiratory Function TestsBone ConductionElectrocardiographyVital Capacity