AtaxiaCerebellar AtaxiaFriedreich AtaxiaSpinocerebellar AtaxiasGait AtaxiaAtaxia TelangiectasiaAtaxia Telangiectasia Mutated ProteinsIron-Binding ProteinsMachado-Joseph DiseaseLod ScoreTrinucleotide Repeat ExpansionTrinucleotide RepeatsSeverity of Illness IndexCerebellumPedigreeTreatment OutcomeTumor Suppressor ProteinsCell Cycle ProteinsPurkinje CellsProspective StudiesProtein-Serine-Threonine KinasesApgar ScoreQuestionnairesAge of OnsetReproducibility of ResultsCerebellar DiseasesPropensity ScoreMagnetic Resonance ImagingMutationQuality of LifeOcular Motility DisordersNerve Tissue ProteinsApraxiasFragile X SyndromeDysarthriaTime FactorsSyndromeGenes, RecessiveFollow-Up StudiesRetrospective StudiesPhenotypeDNA-Binding ProteinsFragile X Mental Retardation ProteinPredictive Value of TestsGenetic LinkageDNA DamageMyoclonic Cerebellar DyssynergiaNeurologic ExaminationNystagmus, PathologicGenes, DominantPain MeasurementCohort StudiesRisk FactorsBrainDNA Repeat ExpansionKv1.1 Potassium ChannelInjury Severity ScoreNuclear ProteinsMice, Neurologic MutantsOlivopontocerebellar AtrophiesPrognosisPsychometricsIntranuclear Inclusion BodiesCross-Sectional StudiesDisability EvaluationRisk AssessmentROC CurveHeredodegenerative Disorders, Nervous SystemNervous System DiseasesMutation, MissenseChromosome MappingAtrophyDisease ProgressionMultiple System AtrophyAge FactorsAnalysis of VarianceNeuropsychological TestsHealth Status IndicatorsDouble-Blind MethodRecovery of FunctionCase-Control StudiesCognition DisordersHomozygoteSensitivity and SpecificityGenotypeGliadinDisease Models, AnimalVitamin E DeficiencyActivities of Daily LivingRegression AnalysisNeurodegenerative DiseasesCalcium Channels, Q-TypeAllelesMyoclonusConsanguinityHeterozygoteCalcium Channels, P-TypeDNA RepairLongitudinal StudiesFamily Health