title: Genetic influences on attention deficit hyperactivity disorder.
abstract: In this article we review behavioral and molecular genetics studies of attention deficit hyperactivity disorder (ADHD). Family, twin, and adoption studies, along with segregation analyses and molecular genetic studies, all support the hypothesis that both genetic and environmental factors contribute to the etiology of ADHD. Despite this strong evidence for the familial transmission of ADHD, the mode of transmission requires further clarification. In addition, because ADHD appears to be genetically heterogeneous, more work is needed to delineate genetically homogeneous subtypes and describe the range of expression of their underlying genotypes.
authors: Harvard Institute of Psychiatry, Epidemiology, and Genetics, Department of Psychiatry, Massachusetts Hospital Center, Harvard University, 750 Washington Street, Suite 255, South Easton, MA 02375, USA. sfaraone@earthlink.net
authors: S V
authors: SV
authors: Faraone
authors: A E
authors: AE
authors: Doyle
mesh_terms: D000293:Adolescent; D000300:Adoption; D001289:Attention Deficit Disorder with Hyperactivity / Q000235:genetics*; D002648:Child; D020090:Chromosome Segregation / Q000235:genetics; D006801:Humans; D008967:Molecular Biology / Q000379:methods; D018433:Twin Studies as Topic