Wow: Adhd is an inherited neurobiologic disorder of executive brain function. It's there at conception, worsened by prenatal nicotine, alcohol, drug or marijuana exposure. Worsened by premature birth (<38 weeks) distressed birth or neonatal stress. The features of adhd require the ability to assess executive brain function so the patient needs to be at least 4 yo for an accurate diagnosis.
Answered 9/7/2012
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