In 1866, an Englishman, named John Langdon Down, published the first clinical description of the condition that is now called Down syndrome (Capone 2004). According to Turner & Alborz (2003), Down's syndrome occurs in approximately one in six hundred live births per year. Also known as Trisomy 21, Down syndrome is a common birth defect caused by an error in cell division. This error in cell division causes the person to have an extra portion on the number 21 …showed first 75 words of 892 total…

…showed last 75 words of 892 total…and Bacon Capone, George T. M.D. (2004) Down Syndrome: Genetic Insights and Thoughts on Early Intervention. Infants and Young Children, 17, 45-48. Lalo, Elodie & Debu, Bettina. (2003). Visuospatial Attention and Motor Preparation in Individuals with Down Syndrome. Adapted Physical Activity Quarterly, 20, 134-150. Roizen, Nancy J & Patterson, David. (2003). Down's Syndrome. Lancet, 361, 1281-1289. Turner, Stephen & Alborz, Alison. (2003). Academic Attainments of Children with Down's Syndrome: A Longitudinal Study. British Journal of Education Psychology, 73, 563-583.