Thoracic VertebraeSpinal FracturesLumbar VertebraeKyphosisMusclesSpinal FusionInternal FixatorsScoliosisMuscle ProteinsOrthopedic Fixation DevicesMuscle, SmoothBone ScrewsLumbosacral RegionMuscle, SkeletalMuscle Fibers, SkeletalMuscle, Smooth, VascularSpinal InjuriesSpinal CanalSpinal CurvaturesFracture Fixation, InternalMuscle DevelopmentMuscle ContractionDecompression, SurgicalFractures, CompressionSpineVertebroplastySpinal NeoplasmsKyphoplastyFasciaBracesMuscle FatigueMuscle Fibers, Fast-TwitchMuscle DenervationTuberculosis, SpinalMuscle Fibers, Slow-TwitchBiomechanical PhenomenaThoracic NervesOrthopedic ProceduresBack PainMyocytes, Smooth MuscleMitochondria, MuscleHypogastric PlexusSpinal DiseasesVisceral AfferentsSpinal Cord CompressionOperative TimeDislocationsAchondroplasiaTreatment OutcomeLordosisNeck MusclesOculomotor MusclesThoraxReconstructive Surgical ProceduresSurgical Procedures, Minimally InvasivePolymethyl MethacrylateMuscle, StriatedMuscle SpindlesFracture FixationMuscle RelaxationRibsCadaverRespiratory MusclesMuscle WeaknessPapillary MusclesLaminectomyNeurosurgical ProceduresWeight-BearingIntervertebral Disc DisplacementLumbosacral PlexusSpinal CordTomography, X-Ray ComputedSpinal Cord InjuriesAbdominal MusclesQuadriceps MuscleIntervertebral DiscRetrospective StudiesMuscle CellsBone TransplantationNeurogenic BowelSacrumPelvisMasseter MusclePseudarthrosisRange of Motion, ArticularFacial MusclesMasticatory MusclesDiscitisIntercostal MusclesMyelographyTime FactorsElectromyographySpinal StenosisInjury Severity ScoreProstheses and ImplantsMuscular AtrophyMagnetic Resonance ImagingOsteotomyIsometric ContractionFollow-Up Studies