Deltoid MuscleShoulderElectromyographyStanozololMovementMuscle, SkeletalShoulder JointArthroplastyLacerationsRotator CuffMusclesInjections, IntramuscularCadaverShoulder PainArmMuscle ProteinsMuscle, SmoothMuscle Fibers, SkeletalMuscle, Smooth, VascularNerve TransferMuscle ContractionMuscle DevelopmentBrachial Plexus