Learn More
OBJECTIVE To update clinicians on the reproductive implications of premutations in FMR1 (fragile X mental retardation 1). Fragile X syndrome, a cause of mental retardation and autism, is due to a full mutation (>200 CGG repeats). Initially, individuals who carried the premutation (defined as more than 55 but less than 200 CGG repeats) were not considered at(More)
Attentional deficits and hyperactivity frequently are major problems for fra(X) boys. This study evaluated the effectiveness of 2 stimulant medications, methylphenidate and dextroamphetamine compared to placebo in 15 children (13 males, 2 females) with the fra(X) syndrome. A double-blind crossover design was used with outcome measures which included parent(More)
Previous studies have reported a drop of IQ in males with Martin-Bell or fragile X syndrome during childhood and adolescence. It is uncertain when and why this drop occurs and whether it affects all fragile X males. We have analyzed longitudinal IQ data on all 24 fragile X males who have been followed for at least 2 years through the Child Development Unit(More)
  • 1