SpasmShoulderShoulder JointShoulder PainMuscle WeaknessMuscle CrampMuscle SpasticityNeck MusclesSpasms, InfantileMuscle, SkeletalMuscular DiseasesCervical AtlasOccipital BoneMyopathies, NemalineShoulder DislocationNeuromuscular AgentsSpinal Cord InjuriesNeckMusclesMice, Inbred mdxMuscular AtrophyHemifacial SpasmUtrophinBotulinum Toxins, Type APainNeck PainHead and Neck NeoplasmsElectromyographyMuscular Dystrophy, DuchenneMotor NeuronsMuscle ProteinsMuscle, SmoothCoronary VasospasmPain ManagementShoulder FracturesChronic PainMuscle, Smooth, VascularScapulaMuscle Fibers, SkeletalRotator CuffPain MeasurementMuscle ContractionEsophageal Spasm, DiffuseMuscle DevelopmentRange of Motion, ArticularBursitisArthroplasty, ReplacementPain, PostoperativePain ThresholdPhenotypeDisease Models, AnimalBack PainLow Back PainFacial MusclesMuscle FatigueErgonovineJoint ProsthesisHumerusMuscle Fibers, Fast-TwitchPain, IntractableMuscle DenervationAbdominal PainJoint DiseasesMuscle Fibers, Slow-TwitchAngina Pectoris, VariantBiomechanical PhenomenaMyocytes, Smooth MusclePain, ReferredMitochondria, MusclePelvic PainPain PerceptionOculomotor MusclesTreatment OutcomeFacial PainMusculoskeletal PainNeck InjuriesJoint InstabilityMuscle RelaxationTime FactorsAcute PainPectoralis MusclesMuscle, StriatedArthroscopyMuscle SpindlesTendinopathyCumulative Trauma DisordersRespiratory MusclesJoint CapsuleArmPapillary MusclesAcromioclavicular JointPeriarthritisMasticatory MusclesAbdominal MusclesMusculoskeletal DiseasesHumeral HeadBrachial PlexusFemoral Neck FracturesAcromionQuadriceps Muscle