http://www.sciencedaily.com/releases/20 ... 092904.htm
This is a very interesting study about the genetics of and relationship between ASD and specific language impairment.
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In the first molecular genetic study of families with a history of both language impairment and autism, scientists may have uncovered a shared origin for the two conditions, an important step toward explaining why some cases of autism are accompanied by language difficulties and others are not.
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The findings are published Oct. 30 in the American Journal of Psychiatry.
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The behavioral genetics study, published in Biological Psychiatry, found that the same genes active in specific language impairment appear in ASD, but their effect is amplified in ASD. That finding, coupled with this new research, suggests that the two disorders may be on an etiological continuum.