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Part I: Conceptual Context. ADHD's Controversies. Defining Disorder. Part II: How Does ADHD Work? Neural Systems. Attention and Arousal. Executive Functioning or Cognitive Control. Motivation. Motor Control and Timing. Part III: Where Does ADHD Come From? Multiple Pathways. Genetic Effects. Uncommon Experiential Risk Factors. Common Experiential Risk Factors. Part IV: Integration. Multiple Pathways Reconsidered. Conclusion.
A Wed, study studied this question.