ADHD-associated genes are the genetic variants and loci that contribute to susceptibility to attention deficit hyperactivity disorder, a highly heritable neurodevelopmental condition. Family, twin, and molecular studies indicate that ADHD arises from the combined effect of many genes of small effect interacting with…
ADHD-associated genes are the genetic variants and loci that contribute to susceptibility to attention deficit hyperactivity disorder, a highly heritable neurodevelopmental condition. Family, twin, and molecular studies indicate that ADHD arises from the combined effect of many genes of small effect interacting with environmental influences, rather than from a single causal mutation. Much investigation has focused on genes involved in neurotransmitter systems, particularly those governing dopaminergic and noradrenergic signalling, which shape attention, impulse control, and reward processing and are also the targets of common pharmacological treatments. Identifying these genes helps clarify the biological basis of the disorder, informs understanding of how core features such as inattention, hyperactivity, and impulsivity emerge, and may eventually support more individualized approaches to diagnosis and treatment. Because ADHD is clinically heterogeneous and persists across the lifespan, genetic findings are interpreted alongside the behavioural and cognitive characteristics studied in affected children, youth, and adults, including impulsivity, sleep disturbance, and the protective and supportive factors that influence outcomes. Scholarship relevant to this area connects the disorder's neurobiology with its observable features and management. The resulting evidence advances understanding of ADHD aetiology, supports research into mechanisms and treatment response, and contributes to a more complete picture of how genetic factors interact with development and environment in the condition.
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