Sleep patterns in mental retardation: Down's syndrome

1977 ◽  
Vol 43 (2) ◽  
pp. 183-191 ◽  
Author(s):  
J Clausen ◽  
E.A Sersen ◽  
A Lidsky
1988 ◽  
Vol 2 ◽  
pp. 43-48
Author(s):  
Cam Wright

Down's Syndrome has long been associated with mental retardation. This has resulted in expectations of moderate or severe mental retardation in individuals with Down's Syndrome (Hopkins, 1983). Although there has been acceptance of the possibility of variability of attainments, a certain predictability of outcome has been assumed since Down's Syndrome is a condition resulting from known chromosomal abnormalities (Springer & Steele, 1980; Hopkins, 1983).


1986 ◽  
Vol 149 (1) ◽  
pp. 68-74 ◽  
Author(s):  
Christopher Gillberg ◽  
Eva Persson ◽  
Marianne Grufman ◽  
Ulla Themnér

A total of 149 children aged 13–17 years were examined. 83 were mildly and 66 severely mentally retarded. These children, especially the severely retarded ones, are representative of all mentally retarded children born in 1966–1970 and living in Göteborg, Sweden. 64% of the severely mentally retarded and 57% of the mildly mentally retarded children were suffering from a handicapping psychiatric condition. Autism-like ‘psychotic behaviour’ was common in the severely retarded. 0.2% of the total child population aged 13–17 years suffering from the combination of mental retardation and ‘psychotic behaviour’. Epilepsy was associated with psychiatric abnormality, but Down's syndrome was generally not so associated.


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