AtrophyMagnetic Resonance ImagingBrainImage Processing, Computer-AssistedTemporal LobeMultiple Sclerosis, Relapsing-RemittingAlzheimer DiseaseCerebral CortexBrain MappingNeuropsychological TestsNerve Fibers, MyelinatedCognition DisordersPeriaqueductal GrayDiffusion Tensor ImagingMuscular AtrophyOrgan SizeNerve Fibers, UnmyelinatedOptic AtrophyMuscular Atrophy, SpinalMultiple System AtrophyFrontal LobeNeuroimagingAnisotropyParticulate MatterSpinal Muscular Atrophies of ChildhoodGyrus CinguliImage Interpretation, Computer-AssistedDiffusion Magnetic Resonance ImagingFunctional LateralitySpinal CordSchizophreniaDominance, CerebralBrain DiseasesCaudate NucleusNeural PathwaysOlivopontocerebellar AtrophiesImaging, Three-DimensionalAgingMultiple SclerosisThalamusGyrate AtrophyCerebellumCerebrumCerebrovascular CirculationPrefrontal CortexParahippocampal GyrusPutamenCase-Control StudiesGeographic AtrophyImage EnhancementHippocampus