Neck MusclesSuperficial Back MusclesElectromyographyTorticollisAccessory NerveVestibular Evoked Myogenic PotentialsShoulderAccessory Nerve InjuriesMastoidMyofascial Pain SyndromesCutaneous FistulaCervical PlexusNeck PainWhiplash InjuriesBackBrachial Plexus NeuritisSurgical FlapsMuscle, SkeletalScapulaShoulder PainRespiratory MusclesAccelerationTrigger PointsMusclesMusculoskeletal PainMuscular DiseasesMuscle ContractionShoulder JointChronic PainMuscle ProteinsMuscle, SmoothPain MeasurementMyalgiaMuscle Fibers, SkeletalOxyhemoglobinsMuscle, Smooth, VascularMotor NeuronsBiomechanical PhenomenaMuscle DevelopmentOccupational DiseasesMuscle FatigueMuscle Fibers, Fast-TwitchMuscle DenervationIsometric ContractionMuscle Fibers, Slow-TwitchCumulative Trauma DisordersMyocytes, Smooth MuscleMitochondria, MuscleBreath HoldingOculomotor MusclesThoracic NervesMuscle, StriatedMuscle SpindlesMuscle Relaxation