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"Anon Poster" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > On Thu, 20 Nov 2003 18:05:40 GMT, mark4asp > <[EMAIL PROTECTED]> wrote: > > >I would be happy to hear that work on identifying all possible factors > >is underway - because I doubt that it can be explained solely by > >genetics if, as you say: "only one child has AD/HD in a family with > >one or more normal children" > > Many disorders are genetic but not all of those are heritable. They > are caused by deletions and transpositions of gene sequences during > cell division around the time the egg or sperm is formed. > > Williams' Syndrome, for example, appears to be one such condition that > is often accompanied by the features of AD/HD. Do tell the others what Williams' Syndrome is. In fact there is a remarkable similarity between Tourette's Syndrome and AD/HD - some say that AD/HD is TS without tics. I don't agree about the latter, but do think that there is a link, just as some say there is an overlap of about 30% between AD/HD and dyslexia. I beleiev that dyslexia is just another (inaccurate) term for those with AD/HD who have difficulty in reading.
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