Psoas MusclesPsoas AbscessMusclesMuscle Fibers, SkeletalMuscle ContractionRabbitsSarcomeresIsometric ContractionMuscle, SkeletalMyosinsMyofibrilsMuscle ProteinsMuscle RelaxationMagnesium CompoundsMuscle, SmoothTroponin CPhotolysisAdenosine TriphosphateParaspinal MusclesMuscle, Smooth, VascularMuscle DevelopmentPhosphatesAdenosine DiphosphateBiophysical PhenomenaCalciumActomyosinMuscle Fibers, Fast-TwitchX-Ray DiffractionMuscle Fibers, Slow-TwitchTroponinBiophysicsRetroperitoneal SpaceKineticsActinsGlycerolBiomechanical PhenomenaMuscle FatigueMyosin SubfragmentsMuscle DenervationActin CytoskeletonRhodaminesElasticityModels, BiologicalMyocytes, Smooth MuscleMitochondria, MuscleAdenosine TriphosphatasesOsmolar ConcentrationNeck MusclesOculomotor MusclesStress, MechanicalMuscle, StriatedTemperatureMuscle SpindlesRespiratory MusclesMuscle WeaknessPapillary Muscles