What causes AD/HD?
Research has demonstrated that AD/HD has a very strong neurobiological
basis. Although precise causes have not yet been identified, there is
little question that heredity makes the largest contribution to the
expression of the disorder in the population.
In instances where heredity does not seem to be a factor,
difficulties during pregnancy, prenatal exposure to alcohol and tobacco,
premature delivery, significantly low birth weight, excessively high
body lead levels, and postnatal injury to the prefrontal regions of the
brain have all been found to contribute to the risk for AD/HD to varying
degrees.
Read more about the disorder at CHADD’s National Resource Center on
AD/HD.
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