There's thought to be a strong genetic component in ADHD. Although it's unlikely that there is a single "ADHD gene," the disorder is more common in people for whom a genetic relative has the disorder, and there's a high rate of concordance among twins, even if they didn't grow up in the same household.
There's not a single chemical that's known to be lacking or absent in patients with ADHD. That doesn't mean that there absolutely isn't one, but if there is, it hasn't been identified yet. The brain is a complicated organ, so it's unlikely that it's a simple as a single neurotransmitter that's not produced at a normal rate.
PET scans of patients with ADHD show reduced activity in the prefrontal cortex (PFC) compared to normal patients. The PFC is thought to be involved in impulse control and attention (or more specifically, regulating what you do and do not pay attention to).
2007-02-03 06:27:32
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answer #1
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answered by Anonymous
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Yes it runs in families although they are not totally sure it is hereditary. As for the chemical your brain lacks I am not sure what chemical has been named for that. I do know that if you look at the PET scan of a normal persons brain and a brain of someone with ADD/ADHD you can easily see the difference.
2007-02-03 13:35:58
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answer #2
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answered by Anonymous
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Yes, it runs in families, from wikipedia "research suggests that ADHD arises from a combination of various genes many of which affect dopamine transporters."
The etiology of the disorder isn't clear, however, there are many speculations. I recommend reading the wikipedia article on ADHD. Especially if you have it.
Here's the link:
http://en.wikipedia.org/wiki/Adhd
2007-02-03 13:50:52
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answer #3
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answered by Genetic C 2
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It is somewhat genetic and can run in families.
I don't think that there isn't a chemical that is lacking. The prefontal cortex just doesn't function normally.
2007-02-03 13:35:53
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answer #4
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answered by ambr123 5
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It's mostly due to eating a crappy diet - and most American kids eat nothing but sugar-laden cereals, juices, processed foods and snacks.
People who are sugar-sensitive have naturally low levels of serotonin. As a result, you do not have good impulse control. It is almost impossible for you to "just say no" because there is such a short time between your getting the urge to do something and their doing it. The insufficient serotonin level in your brain isn't giving you the time you need to make good decisions. Sometimes you feel high and sometimes you feel low. You may feel focused and alert for thirty minutes after eating, but then you go blank when you answer the phone. Your calm and competent approach to life deserts you. You get frustrated and angry easily.
Children love to run and play. Movement gives them pleasure. This is especially true for children with ADD. They crave excitement as a means for stimulating their lethargic brains. They eat gobs of sweets because sugar offers a quick fix. Unfortunately, their energy drops rapidly once the sugar high fades.
2007-02-03 13:46:48
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answer #5
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answered by Violet Pearl 7
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yes, it is heredity, it does run in families and I don't remember wat chemical of the brain lacks. I need read about my ADHD book more often.
2007-02-03 14:21:39
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answer #6
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answered by alamoleyanet 1
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yes and seritonan ,and other chemicals is a right pain ,but can now at least be controlled
2007-02-03 13:35:05
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answer #7
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answered by whitecloud 5
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