Causative Factors

  • J. Gordon Millichap


ADHD is a highly heritable disorder but in addition to genetic causes, acquired and environmental factors are sometimes uncovered that may be amenable to prevention or specific treatment. The causes of ADHD may be characterized as idiopathic, arising spontaneously from an unknown cause, symptomatic and secondary to a brain structural abnormality, or familial and presumed genetic. A majority of cases of ADHD are idiopathic or of uncertain cause. A delay in development or maturation of the nervous system is sometimes proposed as an explanation for ADHD, especially in children with mild or “soft” neurological deficits.


Iodine Deficiency Lead Exposure Serum Ferritin Level Congenital Hypothyroidism Fetal Alcohol Syndrome 
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© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • J. Gordon Millichap
    • 1
  1. 1.Division of NeurologyNorthwestern University Medical School, Children’s Memorial HospitalChicagoUSA

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