Williams SyndromeAortic Stenosis, SupravalvularSyndromeSpace PerceptionChromosomes, Human, Pair 7Perceptual DisordersElastinFaciesNeuropsychological TestsLim KinasesVisual PerceptionPersonal Construct TheoryNervous System MalformationsFaceIntellectual DisabilityIntelligenceMagnetic Resonance ImagingAttentionCognition DisordersDown SyndromeCardiovascular AbnormalitiesHistory, 19th CenturyPhotic StimulationCognitionCreativityMemory DisordersParietal LobeAbnormalities, MultipleIn Situ Hybridization, FluorescenceBrain MappingPsychomotor PerformanceHistory, 17th CenturyFunctional LateralityPattern Recognition, Visual