Huntington DiseaseMinorsGenetic CounselingAmyotrophic Lateral SclerosisGenetic TestingAsymptomatic DiseasesFacial Nerve InjuriesAlzheimer DiseaseHeterozygote DetectionSuperoxide DismutaseHeterozygotePedigreeMutationHepatolenticular DegenerationDisease Models, AnimalPresenilin-1BrainMice, TransgenicAdenomatous Polyposis ColiEarly DiagnosisGenetic LinkageAtrophyMotor NeuronsGenetic MarkersMagnetic Resonance ImagingFacial NerveMotor Neuron DiseaseAge of OnsetSpinocerebellar AtaxiasCaudate NucleusNeuropsychological TestsSpinal CordPrenatal DiagnosisPolymorphism, Restriction Fragment Lengthvon Hippel-Lindau DiseaseGenetic Diseases, InbornGenes, APCPositron-Emission TomographyNeonatal ScreeningGenes, DominantParkinson DiseaseDisease ProgressionNerve DegenerationApolipoprotein E4tau ProteinsFamily HealthDNA Mutational AnalysisAmyloid beta-PeptidesImage Processing, Computer-AssistedGenetic Predisposition to DiseaseAmyloid beta-Protein PrecursorLod ScoreCorpus StriatumGenotypeNerve Tissue ProteinsBiological MarkersDNA ProbesPredictive Value of TestsAge FactorsAllelesPolymerase Chain ReactionCognition DisordersMice, Inbred C57BLDiffusion Magnetic Resonance ImagingPhenotypeCase-Control StudiesBrain MappingRisk FactorsTime FactorsChromosome MappingAnalysis of VarianceLongitudinal StudiesDNAPolymorphism, GeneticNuclear ProteinsNeuronsMolecular Sequence DataBase SequenceInfant, Newborn