SPHS-S 425 Lecture Notes - Lecture 2: Specific Language Impairment, Stuttering, Down Syndrome
22 Oct 2018
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Genetics primer: chromosomes reside in the nucleus of cells, each chromosome contains many genes, 46 chromosomes total, 23 from mom, 23 from dad. What are some genetic conditions that can affect speech and language: tourets, autism, specific language impairment, down syndrome. Is there a relationship between genetics and the type of family history (chronicity or recovery: yes. Individuals of families who persist in their stuttering are more likely to continue stuttering. Individuals of families who recovered from stuttering are more likely to recover as well: predictive value in family history. Adoption studies: why are adoption studies one of the most powerful means of examining the influence of heredity on stuttering, looking at environment v. genetics. Transmission models: have ruled out the following models to explain stuttering, sex-linked, environment, autosomal dominant/recessive, single major gene, possible ideas, multiple genes, multiple genetic and environmental factors, single major gene and multifactor, single major gene and other genes.
