Preliminary Evidence for a Positive Relation Between the COMT rs4680 Met/Met Genotype and Math Achievement.

To identify if polymorphisms interact with executive functions as predictors of math skills, we assessed 38 adolescents (mean age = 16.4 ± 0.80 years, IQ > 80) from a larger study of high-school students screened for their mathematical abilities.

"Like parent, like child": Attention deficit hyperactivity disorder-like characteristics in parents of ADHD cases.

The objective of this study was to characterize an attention deficit hyperactivity disorder (ADHD) endophenotype in non-affected parents of adolescents with a history of ADHD, based on the relationship between performance on a sustained attention test (continuous performance task, or CPT) and polymorphisms of the DRD4 gene. In a sample of 25 non-affected parents of adolescents with ADHD history obtained from a longitudinal study of a nonclinical population, and 25 non-affected parents of adolescents with no ADHD history, four groups were evaluated with respect to the presence or absence of the long allele polymorphism of the DRD4 gene (i.e.

The fifth female patient with Myhre syndrome: further delineation.

We report the fifth female patient with Myhre syndrome (MS) and review the literature. She is a 13-year-old Mexican girl whose phenotype fulfills all the clinical and radiological criteria reported in MS such as typical facies, short stature, limited joint mobility, and short hands and feet. The physical habitus of MS is described and a square body shape is clearly distinguished in all cases.

Syntactic processing in Turner's syndrome.

A significant controversy concerning language development in Turner's syndrome has been found. Whereas some authors have observed that girls with Turner's syndrome maintain their verbal abilities intact, others have reported significant differences in Wechsler Verbal IQ when compared with normal controls. However, little has been studied about the linguistic characteristics of these patients when using tests to evaluate different linguistic levels.

Autosomal dominant inheritance in Cantú syndrome (congenital hypertrichosis, osteochondrodysplasia, and cardiomegaly).

Cantú syndrome (CS) is characterized by congenital hypertrichosis, osteochondrodysplasia, cardiomegaly, and coarse facial appearance; autosomal recessive inheritance has been postulated. We report on a Mexican family with CS; the affected members are the 44-year-old father and his two children (a male and female), aged 14 and 4 years, respectively; each shows the classic characteristics, but the father and the brother also have a previously unreported feature, namely, a thick calvarium. This is the first reported instance of male-to-male transmission of CS.