There is no consensus on the question, What causes attention deficit disorder with hyperactivity texas health school or without hyperactivity. At the same time, many studies (including studies involving identical twins) indicate that there is a genetic link, that is, it appears that ADHD run in families, and that the prevalence of ADHD among siblings or parents and their children, when one family member suffers texas health school from the disorder, can be four times more than the general population. Also, various theories texas health school suggest a genetic link with the environmental texas health school impact or Hthgotit. Children with ADHD issues specific version of a gene, have the thinner brain tissue in areas of the brain associated ADHD. However, in this study, of the NIMH found that this condition was not permanent, texas health school and that when the children grew, evolved brain tissue to normal and that the symptoms improved. Another model is based on biochemical theory, that ADHD is associated with abnormal texas health school levels of neurotransmitters in the brain (neurotransmitters), such as norepinephrine, serotonin and dopamine. According to this model, regulation of neurotransmitter levels in the brain, for example through drug treatment using antidepressants may improve symptoms of attention deficit disorder with or without hyperactivity. Another theory links between diet and the emergence of symptoms of ADHD. In UK the tested children aged 3 and 8/9 years, the results of which were published in November 2007 in the journal Lancet (Lancet), is a possible texas health school link between consumption of artificial food additives such as colorings and preservatives, and the aggravation of the symptoms associated with ADHD. In response to the study results, taken in England steps to make food manufacturers to reduce the addition of artificial substances to foods as well as to inform the public the potential risk associated with eating foods containing certain artificial materials (food coloring E110, E104, E122, E129, E102, E124). However it should be noted that due to the small number of studies on the link between preservatives and food coloring and ADHD, it seems that more studies are needed to further confirm this theory.
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