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From: Ken St. Louis
Date: 06 Oct 2010
Time: 16:39:09 -0500
Remote Name: 157.182.15.31
I don't know the answer to your question, but I suggest you look at the thread on genetics below wherein Dennis Drayna speculates about non-genetic causes. I will say, however, that the research that has been done has shown that DIFFERENT chromosomes have appeared to load for stuttering in different pedigree studies where a large number of family members stuttered. Samples, for example, in the USA, Cameroon, and Denmark have not been equivalent on the chromosomes and genes expressed in genetic studies. I take that to mean that stuttering can be caused by/related to different genetic influences. Also, if cluttering is added, then the picture becomes more complex, just as it does when other coexisting disorders are considered. I hope that begins to deal with your question. Ken