Similarity of IQs of siblings with Duchenne progressive muscular dystrophy.
The similarity of IQs of siblings with Duchenne progressive muscular dystrophy (DMD) was examined to determine whether the view that downward shift in IQ of patients with DMD is a genetically determined primary manifestation of the disease. The mean IQ difference was smaller and the IQ correlation was higher for siblings with DMD than for siblings without the disease. Moreover, these two indices were closer to those for healthy monozygotic twins reared together. These results suggest that the lowered IQ in patients with DMD has a genetic background.
Ogasawara
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Suzuka-Byoin National Sanatorium, Suzuka City, Japan.
D000293:Adolescent; D000328:Adult; D002648:Child; D006801:Humans; D007361:Intelligence Tests; D008297:Male; D009136:Muscular Dystrophies / Q000235:genetics / Q000523:psychology*