Attention-deficit hyperactivity disorder causes
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Charmaine Patel, M.D. [2]
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Attention-deficit hyperactivity disorder Microchapters |
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Differentiating Attention-Deficit Hyperactivity Disorder from other Diseases |
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Diagnosis |
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Treatment |
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Overview
There are no established causes of ADHD. Studies suggest that ADHD results from a complex interaction between genetic and environmental factors.
Causes
ADHD likely stems from an interaction between genetic factors and external factors, including trauma or exposure to toxins. The genetic component of the disease has been demonstrated by the increased likelihood that a person for whom ADHD runs in his/her family is more likely to have ADHD than a person with no family history of the disorder. Studies have also shown that there is a familial transmission of the disorder which does not occur through adoptive relationships. Twin studies indicate that the disorder is highly heritable and that genetics contribute about three quarters of the total ADHD population, leaving the contribution of non-genetic factors at around 25%. [1]
References
- ↑ OurMed. (2010). "Attention-deficit hyperactivity disorder."