Neck MusclesHeadacheHeadache DisordersNeckTension-Type HeadacheMusclesCluster HeadacheHead MovementsNeck PainHead and Neck NeoplasmsElectromyographyVascular HeadachesHeadTorticollisMuscle, SkeletalMigraine DisordersMuscle ProteinsMuscle, SmoothMuscle ContractionFacial MusclesHeadache Disorders, SecondaryMuscle Fibers, SkeletalMuscle, Smooth, VascularVibrationLabyrinth DiseasesMastoidProprioceptionAccelerationMuscle DevelopmentOccipital BonePostureWhiplash InjuriesIsometric ContractionTegmentum MesencephaliMuscle FatigueMuscle Fibers, Fast-TwitchMuscle DenervationAnti-Dyskinesia AgentsCervical VertebraeFixation, OcularMuscle Fibers, Slow-TwitchElectric StimulationMyocytes, Smooth MuscleMitochondria, MuscleMotor NeuronsVestibule, LabyrinthMovementBiomechanical PhenomenaTime FactorsOculomotor MusclesNeck InjuriesMuscle, StriatedOrientationMuscle SpindlesMuscle WeaknessMuscle RelaxationCatsPsychomotor PerformanceRespiratory MusclesPapillary MusclesSuperior ColliculiRotationMagnetic Resonance Imaging