Neck MusclesMuscle RigidityMusclesElasticityMuscle, SkeletalBiomechanical PhenomenaMuscle ContractionReflex, StretchNeckElectromyographyMyotoniaMyotonia CongenitaIsometric ContractionMyotonic DisordersHead MovementsAnkle JointNeck PainAnkleHead and Neck NeoplasmsHeadTorticollisMuscle ProteinsStress, MechanicalMuscle, SmoothMuscle Fibers, SkeletalFacial MusclesRange of Motion, ArticularVibrationMuscle, Smooth, VascularLabyrinth DiseasesPostureProprioceptionAccelerationMastoidMuscle DevelopmentOccipital BoneModels, BiologicalWhiplash InjuriesTegmentum MesencephaliMuscle FatigueMuscle Fibers, Fast-TwitchMuscle DenervationMovementMuscle Fibers, Slow-TwitchFixation, OcularElectric StimulationAnti-Dyskinesia AgentsCervical VertebraeMyocytes, Smooth MuscleMitochondria, MuscleTime FactorsMotor NeuronsVestibule, LabyrinthMuscle RelaxationOculomotor MusclesMuscle SpindlesNeck InjuriesElastic ModulusPapillary MusclesRotationMuscle, StriatedCatsMuscle WeaknessOrientationPsychomotor PerformanceRespiratory MusclesSuperior ColliculiPulse Wave AnalysisQuadriceps MuscleMacaca mulattaElasticity Imaging TechniquesMasticatory MusclesArteries