Muscle HypotoniaMusclesMuscle ProteinsMuscle, SkeletalMuscle, SmoothAbnormalities, MultipleMuscle Fibers, SkeletalMuscle, Smooth, VascularIntellectual DisabilityMuscle DevelopmentMuscle ContractionFaciesSyndromePrader-Willi SyndromeMuscle FatigueMuscle Fibers, Fast-TwitchMuscle DenervationMuscle Fibers, Slow-TwitchMyopathies, Structural, CongenitalMyopathies, NemalineMyocytes, Smooth MuscleMuscular DiseasesMitochondria, MuscleMuscle HypertoniaDevelopmental DisabilitiesNeck MusclesOculomotor MusclesMicrocephalyAtaxiaMuscle, StriatedMuscle SpindlesElectromyographyMuscle RelaxationRespiratory MusclesMuscle WeaknessPapillary MusclesMyopathy, Central CoreChromosomes, Human, XChromosome Deletion