Adolescence is a developmental period associated with an increase in impulsivity. Impulsivity is a multidimensional construct, and in this study we focus on one of the underlying components: impatience. Impatience can result from (i) disregard of future outcomes and/or (ii) oversensitivity to immediate rewards, but it is not known which of these evaluative processes underlie developmental chang...

How orientation maps in the visual cortex of the brain develop is a matter of long standing debate. Experimental and theoretical evidence suggests that their development represents an activity-dependent self-organization process. Theoretical analysis [1] exploring this hypothesis predicted that maps at an early developmental stage are realizations of Gaussian random fields exhibiting a rigorous...

This study investigated ego developmental differences in adolescent academic orientations and academic achievement. A sample of 142 male and female high school students completed the Washington University Sentence Completion Test and self-report measures assessing academic locus of control, learning orientation (LO), and grade orientation (GO). With increasing ego development, adolescents demon...

aim: considering the fundamental role of parents' function and family dynamics including the importance role of family communication pattern on preventing early-onset substance use in children, the present study aimed to determine the correlation between family communication pattern and mothers' preventive behavioral intention regarding preventing early-onset substance use in children...

In the visual cortex of many mammals, orientation preference changes smoothly along the cortical surface, with the exception of singularities such as pinwheels and fractures. The reason for the existence of these singularities has remained elusive, suggesting that they are developmental artifacts. We show that singularities reduce the length of intracortical neuronal connections for some connec...

how to cite this article: zamani gh, shervin badv r, niksirat a, alizadeh h. cns structural anomalies in iranian children with global developmental delay. iran j child neurol. 2013 winter; 7 (1):25-28.   objective central nervous system (cns) malformations are one of the most important causes of global developmental delay (gdd) in children. about one percent of infants with gdd have an inherite...

Epithelial cells mostly orient the spindle along the plane of the epithelium (planar orientation) for mitosis to produce two identical daughter cells. The correct orientation of the spindle relies on the interaction between cortical polarity components and astral microtubules. Recent studies in mammalian tissue culture cells suggest that the apically localised atypical protein kinase C (aPKC) i...

Because adolescents are generally viewed as "risk-takers," an assessment of planning and decision-making skills during the teenage years may reveal why this developmental group tends to engage in dangerous behaviors. One area in which these abilities have significant consequences for future outcome is pregnancy, a condition that requires a decision to either give birth or abort. Previewing, a p...