Attention-Deficit Hyperactivity Disorder Across the Lifespan.

Area of Science:

• Child and Adolescent Psychiatry
• Neurodevelopmental Disorders
• Genetics

Background:

• Attention-deficit hyperactivity disorder (ADHD) impacts up to 10% of school-aged children.
• ADHD frequently persists into adulthood and is associated with significant comorbidities like disruptive, mood, and anxiety disorders.
• A subset of individuals with childhood ADHD develop substance abuse, antisocial behavior, and mood disorders in adulthood.

Purpose of the Study:

• To summarize current understanding of ADHD etiology, presentation, and treatment.
• To highlight the neurobiological underpinnings suggested by neuroimaging studies.
• To identify needs for future long-term research.

Main Methods:

• Review of existing literature on ADHD prevalence, comorbidity, genetics, and neurobiology.
• Synthesis of findings from pharmacotherapy and behavioral therapy studies.
• Analysis of neuroimaging research implicating attention networks, reward systems, and default mode network.

Main Results:

• Pharmacotherapy (stimulants, atomoxetine, alpha-agonists) and behavioral therapy are effective short-term treatments for ADHD.
• Genetic studies suggest polygenic risk factors for ADHD.
• Neuroimaging indicates altered cortical attention networks, ventral striatal reward systems, and default mode network regulation in ADHD.

Conclusions:

• While many children with ADHD achieve good long-term outcomes, a significant portion faces adult challenges.
• Current neuroimaging techniques are not clinically applicable.
• Further long-term studies are crucial for optimizing both medication and psychosocial interventions for improved ADHD outcomes.