ButtocksPiriformis Muscle SyndromeHip ContractureContractureTorsion AbnormalityMuscle, SkeletalSciaticaMusclesRange of Motion, ArticularPyomyositisFluoroscopyCadaverMuscle ProteinsMuscle, SmoothNerve Compression SyndromesAbscessInjections, IntramuscularMuscle Fibers, SkeletalSciatic NeuropathySciatic NerveCompartment SyndromesMuscle, Smooth, VascularMyxosarcomaNeedlesNeuromuscular DiseasesMuscle DevelopmentMuscle ContractionThighKnee-Chest PositionSacrococcygeal RegionMuscle FatigueMuscle Fibers, Fast-TwitchSubcutaneous FatMuscle DenervationRadiography, InterventionalTorsoMuscle Fibers, Slow-TwitchPerforator FlapInjectionsTuberculosis, CutaneousPain ManagementLumbosacral PlexusMyocytes, Smooth MuscleMitochondria, Muscle